Control our emotions - The prefrontal cortex is involved in higher-level functions such as decision-making, planning, and working memory, but not directly in the regulation of emotions. The amygdala is the primary brain region responsible for emotional processing.
What is functions?A function is a block of code which performs a specific task. It is a subroutine that can be used multiple times in a program, allowing the code to be reused and reducing the amount of code written. Functions are often referred to as methods or subroutines. They can accept parameters which can be used to modify how the function behaves and returns a value when it has completed. Functions help to break down a large program into smaller, manageable chunks and make the code easier to read and debug.
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consider the image below, which shows a cell nucleus with one pair of homologous chromosomes that has not undergone crossing over. then, click on all of the true statements.
One chromosome is formed by A and B, and the other is by C and D. Two chromosomes make up a homologous chromosome, one from each parent.
Despite sharing the same genes, they may have different gene alleles. The daughter cells produced if this cell goes through meiosis will have one chromosome each. The daughter cells of this cell will each have two chromosomes if it goes through mitosis. The nucleus of every somatic cell in an organism all cells other than gametes or reproductive cells that make up a multicellular organism contains two identical copies of each chromosome, or homologous chromosomes. Somatic cells are known as "body" cells.
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The small amount of dissolved oxygen found in warm water is considered a _______ to the success of many fish species.A. biotic factorB. limiting factorC. nicheD. None of these are correct.
The tiny amount of dissolved oxygen present in warm water is thought to be a barrier to the development of many fish species.
Of the following, which one is an illustration of a detrital food chain?When microscopic animals like bacteria or fungi eat decomposing organic matter, that is another example of a detritus food chain. These tiny animals are afterwards eaten by other detritivorous organisms like snails, earthworms, and so on.
What is debris, and give an example?Detritus refers to waste or debris. Detritus can refer to any collection of materials, not just those created by humans, and is typically used to refer to rubbish or junk of some form. Detritus includes organic materials that has decayed, such as mounds of dead leaves, loose gravel, silt, and sand.
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The interior of the cell is negatively charged compared to the extracellular fluid. As a result of the electrical gradient between the two areas
A. there will be a net movement of chloride ions into the cell
B. there will be net movement of potassium ions outside of the cell
C. there will be a net movement of water into the cell
D.there will be a net movement of sodium ions into the cell
As a result of the electrical gradient between the two areas - B. there will be a net movement of potassium ions outside of the cell, and D.there will be a net movement of sodium ions into the cell
The interior of the cell is negatively charged compared to the extracellular fluid, this creates an electrical gradient between the two areas. As a result of this gradient, there will be a net movement of positively charged ions, such as potassium and sodium, across the cell membrane. Potassium ions will tend to move out of the cell due to the higher concentration of potassium ions inside the cell compared to the outside. Sodium ions will tend to move into the cell due to the higher concentration of sodium ions outside the cell compared to the inside.
A is not correct because there will be a net movement of chloride ions out of the cell, due to the higher concentration of chloride ions outside the cell compared to the inside. C is not correct because the net movement of water into the cell is not directly related to the electrical gradient. Rather, it is a result of osmosis, the diffusion of water across a selectively permeable membrane from an area of high water concentration to an area of low water concentration.
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What 18th-century British theologian asserted that living things show evidence of purposeful design by their Creator?
William Paley (1743–1805), one of the most influential English authors of his time, argued forcefully in his Natural Theology (1802a).
Who is 18th-century British theologian?
From its seat in Rome, the Catholic Church dominated southern Europe, spanning Portugal, Spain, France, and Italy, through most of eastern Europe, especially territory held by the Hapsburgs. A panoply of Protestant faiths occupied northern Europe, with small Catholic enclaves throughout.Christianity in the 18th century is marked by the First Great Awakening in the Americas, along with the expansion of the Spanish and Portuguese empires around the world, which helped to spread Catholicism.The 18th century was also part of the "The Age of Enlightenment," a historical period characterized by a shift away from traditional religious forms of authority and a move towards science and rational thought. The effects of 18th-century enlightenment led to the American Revolutionary War and the French Revolution.To learn more about British refers to:
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1. SELECT ONE NATURAL HAZARD IN THE PICTURE AND SUGGEST WAYS ON HOW PEOPLE MUST BE PREPARED TO FACE THE HAZARD IN TERMS OF THE DIFFERENT PERSPECTIVES GIVEN BELOW
CHOSEN HAZARD: VOLCANIC ERUPTION
Pa help po pls... I really need help po. I'll mark brainliest po who answered po.
Example: Earthquake
The natural hazard chosen is volcanic eruption and ways in which people can prepare for it is by closing and locking all windows and outside doors and organizing emergency supplies.
What is Volcanic eruption?This is referred to as a situation in which lava and gas are released from a volcano and could be in an explosive manner.
The best ways in which people can prepare for it is by closing and locking all windows and outside doors to prevent particles from entering into the house which should cause injuries and also organizing emergency supplies in the case of a fire incident etc.
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FILL IN THE BLANK
the law of blank states that genes have alternative forms, or alleles. in a blank organism, the two alleles of a gene separate during blank and gamete formation; each sperm or egg carries only one allele of each pair. this law explains the blank ratio of the f2 phenotypes observed when blank self-pollinate. each organism inherits one allele for each gene from each parent. in blank individuals, the two alleles are different, and expression of the blank allele masks
the law of blank states that the pair of alleles for a given gene segregates into gametes independently of the pair of alleles for any other gene. this law explains the blank ratio of the f2 phenotypes in a cross between blank.
meiosis
dihybrids
recessive
3:1
9:3:3:1
dominant
independent assortment
heterozygous
diploid
monohybrids
segregation
mitosis
FILL IN THE BLANK
the law of segregation states that genes have alternative forms, or alleles. in a diploid organism, the two alleles of a gene separate during meiosis and gamete formation; each sperm or egg carries only one allele of each pair.
This law explains the 3:1 ratio of the f2 phenotypes observed when monohybrids self-pollinate. each organism inherits one allele for each gene from each parent. in heterozygous individuals, the two alleles are different, and expression of the dominant allele masks the law of independent assortment states that the pair of alleles for a given gene segregates into gametes independently of the pair of alleles for any other gene. this law explains the 9:3:3:1 ratio of the f2 phenotypes in a cross between dihybrids.
It is also known as the first inheritance legislation. According to the law of segregation,
When gametes are developing, "the two copies of each genetic factor separate, ensuring that each parent's offspring attains one factor." Or
Each gene is segregated during the gamete's development such that the gamete only has one allele of that gene.
When a person makes gametes, the copies of a gene are separated so that each gamete can only accept one copy. A gamete only receives one allele.
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the term used to describe bacteria that are rod-shaped is ___. multiple choice vibrio coccus coccobacillus bacillus
The term used to describe bacteria that are rod-shaped is vibrio among the following.
Option A is correct.
Bacilli are bacteria with a rod shape. The vibrio coccus coccobacillus bacillus, streptobacillus, of coccobacillus organization is formed when bacilli divide uniformly in one plane.
What is the name of the bacteria with a rod shape?The morphology, or shape, of bacteria is used to classify them. Spherical, rod-shaped, and spiral-shaped bacteria are referred to as cocci, bacilli, and spirilla, respectively.
What does Vibrio resemble?rounded rod The human pathogen Although Vibrio cholerae typically resembles a curved rod, straight rods have been observed in some cases. Even though this appears to be a controlled process, V's regulatory pathways that control cell shape changes.
Question incomplete:
the term used to describe bacteria that are rod-shaped is ___. multiple choice
A. vibrio
B. coccus
C. coccobacillus
D. bacillus
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if mice lack enzymes essential for long-term potentiation processes, which is most likely to occur? response
If mice lack enzymes essential for long-term potentiation (LTP) processes, it is most likely that they would have difficulty forming and maintaining long-term memories.
LTP is a process by which the strength of connections between neurons (synapses) is increased, leading to the formation of new memories. Enzymes play an important role in this process by controlling the synthesis and degradation of key molecules involved in synaptic plasticity. Without these enzymes, the normal mechanisms of LTP would be disrupted, and the mice would likely have difficulty forming and retaining long-term memories. Additionally, these mice may have a deficit in spatial or contextual learning.
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The complete question is :
Which is more likely to happen if mice lack enzymes necessary for long-term potentiation processes?
1- It will have difficulty forming and maintaining long-term memories.
2-It will have strength in forming and maintaining long-term memories.
hepatocytes convert ammonia to urea which is more easily excreted from the body. this is an example of ___ .
Hepatocytes convert ammonia to urea which is more easily excreted from the body. This is an example of detoxification.
What is detoxification?
Detoxification is the physiological or medicinal removal of hazardous substances from a living system, including the human body. This process is mostly carried out by the liver. It can also be used to describe the period of drug withdrawal when an organism returns to normal after a protracted period of using an addictive substance. In medicine, detoxification can be achieved through the removal of ingested toxins, the administration of antidotes, as well as techniques like chelation treatment and dialysis.
Many people who practise alternative medicine support detoxification in many ways, including through detoxification diets. Scientists have called these "a waste of time and money."
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timber companies around the world plant and manage forests to provide timber for human use. an enviornmental benefit of these managed forests is that they seqyester carbon in the biomass of the tress, which
The correct option is (ii): Most like the difference between the Carbon sequested by Common Oak VS Black Locust Trees/Forest in the time period of 2010-2030.
What is the Pattern Shown by the Black Locust forest from 2010-2050?
The amount of CO2 absorbed by black locust trees depends on the tree's growth rate, age, and specific genetics. It is postulated and proven that young, fast-growing trees absorb much more carbon than mature, slow-growing trees. In addition to warm and humid climates (especially where black locusts grow), they also contribute to rapid plant growth, indirectly promoting higher carbon sequestration.
The biomass and carbon stock per unit area of oak forests are typically not as high as those of black locusts. Oak trees tend to grow slower than black locusts, so they can accommodate more individuals at just 67 years of age.Oak trees are typically found in cold, high-altitude climates, leading to a sort of regression of the amount of carbon sequestered by the trees.By 2030, black locust forests will sequester 52,000 tons of carbon, and oak will sequester 39,000 tons of carbon because oak grows at a slower rate than black locusts.Therefore, the correct option is the (ii):Most like difference between the Carbon sequested by Common Oak VS Black Locust Trees/Forest in the time period of 2010-2030.
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Which of the ff classification is appropriate for an infant born to HIV positive women ? A. Confirmed HIV infection C. HIV infection unlikely B. HIV exposed infant D. No HIV infection
Answer:
The appropriate classification for an infant born to HIV positive women is HIV exposed infant (B).
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for the following formulas, (1) determine whether the formula is photosynthesis or cellular respiration, (2) circle the products, and (3) creatively illustrate each reactant or product in the box underneath.
As a result of photosynthesis, oxygen gas is released into the atmosphere and used by people, animals, and other living things for respiration.
1) Photosynthesis - Plants manufacture oxygen and sugar-based energy through a process known as photosynthesis, which uses sunlight, water, and carbon dioxide.
There are three primary types of photosynthesis: C3, C4, and CAM (crassulacean acid metabolism). I had to memorise some of their pathways and mechanisms in college, but I'll focus on the advantages of each and what kinds of plants, forages, and weeds have specialised C3 and C4 photosynthesis.
2) Cellular respiration
In order to release energy in the form of ATP, sugar must be broken down in the presence of oxygen within the mitochondria of organisms (both animals and plants). This process is known as cellular respiration. As waste products, this procedure emits water and carbon dioxide. The process of cellular respiration can be carried out by mitochondria in plants.
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choose the makeup of a haploid set and a diploid set in this cell. select all that apply. choose the makeup of a haploid set and a diploid set in this cell.select all that apply. the chromosomes of one color make up a diploid set. all red and blue chromosomes together make up a diploid set. all red and blue chromosomes together make up a haploid set. blue chromosomes make up a diploid set. red chromosomes make up a diploid set. the chromosomes of one color make up a haploid set. according to the picture, a diploid set and a haploid set cannot be identified.
correct makeup of haploid and diploid set in the given cell are: Option B: all red and blue chromosomes together make up a diploid set. Option F: the chromosomes of one color make up a haploid set.
In the example, red chromosomes belong to one gamete, and blue chromosomes belong to the other gamete, So
a. Red chromosomes make up a diploid set. False, they make up a haploid cell because they only are a single set of chromosomes.
b. All red and blue chromosomes together make up a haploid set. False. They come from two different gametes, which are haploid, so together they make up a diploid cell.
c. Blue chromosomes make up a diploid set. False, they make up a haploid cell because they only are a single set of chromosomes.
d. All red and blue chromosomes together make up a diploid set. TRUE. When both gametes merge (blue chromosomes + red chromosomes) they form a diploid cell.
e. The chromosomes of one color make up a diploid set. False. Nor red or blue chromosomes by themselves can make up a diploid cell, because they are a single set of chromosomes.
f. The chromosomes of one color make up a haploid set. TRUE. One gamete, with one single set of chromosomes, either red or blue, are haploid cells.
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The form of a sugar that is stored in the liver and muscles and broken down when the body requires a burst of energy is...
A. Glucose.
B. Galactose.
C. Glucagon.
D. Glycogen.
The form of a sugar that is stored in the liver and muscles and broken down when the body requires a burst of energy is D. Glycogen
Glycogen is the form of sugar that is stored in the liver and muscles and broken down when the body requires a burst of energy. It is a complex carbohydrate made up of many glucose molecules linked together. The body can quickly break down glycogen into glucose and release it into the bloodstream when needed, providing a quick source of energy for the body's cells. This process is regulated by the hormone glucagon which is produced by the pancreas, when blood sugar levels are low, it causes the liver to convert glycogen to glucose and release it into the bloodstream to raise blood sugar levels.
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if a cell is non-selectively engulfing samples of extracellular fluid, for example to absorb nutrients, it will likely utilize . if a cell is non-selectively engulfing samples of extracellular fluid, for example to absorb nutrients, it will likely utilize . phagocytosis exocytosis receptor-mediated endocytosis pinocytosis
It is likely that a cell will use exocytosis, receptor-mediated endocytosis, pinocytosis, aquaporins phagocytosis, and aquaporins phagocytosis if it is non-selectively consuming samples of extracellular fluid, such as to absorb nutrients.
What is Exocytosis or endocytosis mediated by receptors?Endocytosis that uses receptor proteins on the cell surface to engulf a particular target molecule is known as receptor-mediated endocytosis.
Are endocytosis receptors involved?Macromolecules as well as macromolecular complexes that are typically referred to as ligands can enter cells most specifically by receptor-mediated endocytosis. After the ligands attach to their transmembrane receptors, they enter endocytic vesicles, which merge to form what are known as early endosomes.
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some substances can pass through an actual cell membrane much faster than they passed through the artificial membrane in this study. which of the following statements best explains this finding? responses actual cell membranes have a much thicker phospholipid bilayer than the artificial membrane does. actual cell membranes have a much thicker phospholipid bilayer than the artificial membrane does. actual cell membranes have a variety of proteins embedded in the membrane that are absent in the artificial membrane. actual cell membranes have a variety of proteins embedded in the membrane that are absent in the artificial membrane. hydrophobic substances spend more time between the two layers of phospholipid in the artificial membrane than they do between the layers in an actual membrane. hydrophobic substances spend more time between the two layers of phospholipid in the artificial membrane than they do between the layers in an actual membrane. hydrophilic substances spend more time attached to the polar region of the phospholipids in the artificial membrane than they do attached to the polar region of the phospholipids in an actual membrane. hydrophilic substances spend more time attached to the polar region of the phospholipids in the artificial membrane than they do attached to the polar region of the phospholipids in an actual membrane. skip to navigation
The phospholipid bilayer in real cell membranes is substantially thicker than it is in the synthetic membrane.
A molecule simply dissolve in the phospholipid bilayer during passive diffusion, diffuses through it, and then dissolve in the aqueous solution on the opposite side of the membrane. The only molecules that can freely transport across cell membranes are the smallest ones, including water, carbon dioxide, & oxygen. Energy input is frequently needed to transfer larger or charged molecules into the cell. Considering that there won't be any transport of H+ ions, the lysosomal enzymes won't become active. The primary characteristic of the cell membrane is selective permeability, or the ability of some substances to pass through it without resistance.
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Which of the following is not true about negative feedback?
(C) Homeostasis aims to keep things as they should be for good health. Our bodies primarily maintain homeostasis by returning to the initial fixed point through negative feedback.
what is Homeostasis ?The stable internal, external, and chemical conditions that are maintained by living systems are known as homeostasis in biology. In order for the organism to function at its best, a number of factors, including body temperature and fluid balance, must be maintained within predetermined ranges.
what are negative feedback?When a system, process, or mechanism's output is fed back in a way that seeks to lessen oscillations in the output, whether brought on by changes in the input or other disturbances, this is referred to as negative feedback.
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complete question
Which of the following is not true about negative feedback?
A) Once the set point is attained, the response stops.
B) It tries to return the body to its set point.
C) It changes the set point so the new conditions become the new normal.
D) It helps maintain homeostasis.
use this dichotomous key to identify the taxonomic order of each insect. (hint: all of the insects belong to different orders). the information for the first insect has been completed for you.
Once you know what to do with them, they're really not that difficult. In order to identify these bacteria that used a dichotomous key, we would start at question number, which in this instance would be "the shape is circular.
What do bacteria do?A big collection of single-cell microbes. Some harm both humans and animals by infecting them with sickness. Microscopically small, single-celled organisms known as bacteria can be found both within and outside of other living things. They are present in millions in every habitat. While some germs are dangerous, the majority are helpful.
Describe an organism?An independent living creature that works as a living thing using organs with distinct roles.
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describe which gene transfer method can most likely be used to insert the new plasmid into a bacterial cell. (methods of gene transfer were outlined and discussed in lesson 1.2)
Answer:
The gene transfer method that can most likely be used to insert a new plasmid into a bacterial cell is transformation.
Transformation is a method of introducing foreign DNA into a bacterial cell by making the cell temporarily permeable to the DNA. This can be done by exposing the cells to high salt concentrations or by treating them with a chemical called calcium chloride, which causes the cell membrane to become more permeable. Once the cell membrane is permeable, the plasmid can enter the cell and be taken up by the cell's machinery, allowing the cell to express the new gene or genes encoded by the plasmid.
Another method that can be used to insert a new plasmid into a bacterial cell is electroporation, which involves applying a high-voltage electric pulse to the cells, creating temporary pores in the cell membrane through which the plasmid can enter the cell.
Conjugation is another option. It is a process by which plasmids are transferred from one bacterial cell to another through direct cell-to-cell contact, and it's mediated by a specialized plasmid called a fertility plasmid or F-plasmid, also called a conjugative plasmid.
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Some processes cycle carbon into the atmosphere, some processes remove carbon from the atmosphere and some cycle carbon both into and out of the atmosphere.
Drag and drop the following processes into the correct category of cycling carbon into or out of the atmosphere. Some choices may be used more than once or not at all.
(2 points)
burning fossil fuels
Cycle carbon into the atmosphere
:: equilibrium with the ocean
4
burning fossil fuels
Cycle carbon out of the atmosphere
equilibrium with the ocean
:: respiration :: photosynthesis
:: limestone formation
The carbon cycle outlines the transfer of carbon from human sources to the atmosphere, soils, living things, the ocean, and living things.
What steps of the carbon cycle take carbon out of the atmosphere?Trees are particularly effective at storing the carbon dioxide that photosynthesis removes from the environment. Photosynthesis is a natural process that removes carbon dioxide from the atmosphere.The carbon cycle outlines the transfer of carbon from human sources to the atmosphere, soils, living things, the ocean, and living things. The transfer of carbon between living things—plants, animals, and microbes—as well as between the earth's minerals and the atmosphere takes place through the carbon cycle. In the universe, carbon ranks fourth in terms of abundance.Carbon dioxide is taken out of the air by photosynthesis and fixed as organic molecules in the producers. When living creatures consume organic substances, respiration occurs, releasing carbon dioxide into the atmosphere.To learn more about carbon cycle refer to:
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Answer:
I Just did the quick check and it was all right :)
Explanation:
Cycle carbon into the atmosphere -
Burning Fossil Fuels
respiration
equilibrium with the ocean
Cycle carbon out of the atmosphere-
equilibrium with the ocean
Photosynthesis
Limestone Formation
Choose the best answer. High concentrations of cholesterol in tissues leads to:
1- Decreased expression of the gene for HMG-CoA Reductase
2- Decreased expression of the gene for the LDL receptor
3- Activation of Acyl-CoA Cholesterol Acyltransferase (ACAT)
All three of the choices are caused by tissues with high cholesterol content.
Why are tissues used?The material that fills the spaces between cells is called the intercellular matrix. This could be prevalent in some areas but not in others.
What functions do tissues serve?A group of cells that function as a single unit and share a shared structure and function make up tissue. The body 's tissues giving it shape and help to store energy and retain heat. The three different kinds of tissues include collagen, epithelial tissue, muscular tissue, and nerve tissue.
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which of the following nutrients is the most energy-dense? question 3 options: protein carbohydrates minerals vitamins fat
Fat is the most energy-dense nutrient, providing 9 calories per gram.
What is nutrient?For an organism to survive, grow, and reproduce, species needs nourishment. Carbohydrates, proteins, lipids, vitamins, minerals, and water are the broad categories that it falls under. Carbohydrates provide energy, proteins build and repair tissue, fats provide energy and help to absorb vitamins, vitamins regulate chemical processes, minerals are used in a variety of ways, and water transports nutrients and helps in digestion. Eating a balanced diet including a variety of nutrient-rich foods is essential for optimal health. A chemical compound (such as protein, fat, carbohydrate, vitamin, or mineral) contained in foods. These compounds are used by the body to function and grow.
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Which of the following best describes the change in the carrying capacity of the human population if growth is limited by conditions set forth by the Malthusian theory?
A) The carrying capacity will increase, and the human population size will grow exponentially
B) The carrying capacity will remain constant, and the human population size will stabilize
C) The carrying capacity will remain constant, and the human population size will experience an overshoot
D) The carrying capacity will decrease, and the human population size will experience a dieback
The carrying capacity will increase, and the human population size will grow exponentially.
What is Malthusian theory ?According to the Malthusian idea, the number of people continues to increase faster than the amount of food available until famines, war, or disease cause the population to decline. Over the last three centuries, he thought, the human population had increased.
Malthus also claimed that arithmetic progression a number series with a constant difference between subsequent terms increases food supply. The constant difference, for instance, is 2 in the series 2, 4, 6, 8, and 10. The Law of Diminishing Returns led Malthus to this conclusion.
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Which of the following is NOT living?
a). fungi
b). bacteria
c). archaea
d). sand, rocks, and water
e). animals
true/false. extinctive burst: when an animal no longer receives regular reinforcement, its original behavior will sometimes spike (meaning increase dramatically) - this is known as an extinction burst. khan academy
extinction burst: when an animal no longer receives regular reinforcement, its original behavior will sometimes spike (meaning increase dramatically) - this is known as an extinction burst. This is a true statement.
An extinction burst is defined as a quick, sharp rise in behaviour after the activity's reinforcers have been eliminated. As the reinforcement for the behaviour no longer accompanies the deliberate action, the transient response pattern will wane and eventually end.
A reinforcement is any outcome of voluntary behaviour that raises the frequency of that behaviour. Getting something good and desirable, like a material reward, or getting something unwanted out of the way, like an inconvenience, can serve as reinforcement. Once this connection has been made or taught, the behaviour will persist and become more frequent. However, operant training predicts that the behaviour will diminish or stop when the reinforcement of a favourable result is removed.
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make a distinction between air distribution and gas exchange in the respiratory system. identify the organs that serve as air distributors and gas exchangers.
The supply of air to the respiratory tract and its associated structures is referred to as air distribution. This occurs between the outside environment and the respiratory tract.
Gas exchange occurs between the alveoli and the blood vessels. As a result, it occurs between the respiratory and circulatory systems.
Organs involved in air distribution: The majority of the structures in the respiratory system aid in the distribution of air. They are the nose, pharynx, epiglottis, larynx, trachea, lungs, and bronchi.
Organs involved in gas exchange: Alveoli and alveolar ducts aid in gas exchange between the lungs and the circulatory system.
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A lion's body cells perform many tasks at once; for example, some cells are involved in growing new claws and some cells help the lion keep breathing.
Which statement tells the most important factor that allows cells to keep accomplishing their many tasks?
A. It eats plants and converts the sugar in plants into ATP by cellular respiration.
B. Metabolism is the balance an organism maintains between building up and breaking down substances in its cells.
C. Cells are constantly producing usable energy in the form of ATP.
D. They usually have certain special functions.
Utilizable energy in the shape of ATP is continuously produced by cells. the most crucial element that ensures that cells continue to carry out all of their many tasks
What role does a cell play?In addition to absorbing nutrients from meals and converting those into energy, they also provide the body structure and perform certain tasks. Additionally, cells may replicate themselves and hold the genetic material of the organism. Each component of a cell performs a distinct purpose.
Why are cells important and what are they?All living creatures, from microbes to people, depend on their cells for structure and functionality. They are regarded by scientists as the tiniest form of life. The cellular machinery that creates the proteins, enzymes, and signals necessary for everything that occurs inside of our bodies is housed within cells.
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A botanist is studying the genetics of a particular species of plant. She knows that one plant may contain hundreds of individual seeds, each of which is the result of a separate fertilization event. She determines that seed color is controlled by a single gene with two alleles. The dominant allele results in black seeds, and the recessive allele results in brown seeds. In a follow-up experiment, the botanist crosses a homozygous dominant plant with a heterozygous plant. Which of the following is the best prediction for the frequency of brown seeds that would result from this cross?
A. 0.00
B. 0.25
C. 0.50
D. 1.00
The best prediction for the frequency of brown seeds that would result from the homozygous dominant and heterozygous cross is 0.
According to the question the dominant allele result in black seeds and recessive allele in brown seeds. Let us consider R as the dominant seed and r as the recessive seed.
The botanist crosses a homozygous dominant plant with a heterozygous plant. A plant that is homozygous will have only the dominant allele (RR) while the heterozygous will have its genes blend the two alleles (Rr). Crossing the two gives,
RR x Rr = 2RR, 2Rr
R is dominant over r, hence from the genotypes of the offspring, RR and Rr will appear to have black seeds. Thus the frequesncy of black seed is 100 and for brown seed is 0.
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A newly discovered microscopic structure is hypothesized to be a living organism. Which of the following characteristics would best support this hypothesis?
a. The microscopic structures do not require energy.
b. The microscopic structures contain organic compounds.
c. The microscopic structures are reproducing on their own.
d. The microscopic structures do not maintain homeostasis.
Energy is not needed by the microscopic structures. These qualities would most strongly support this theory.
Which definition of tiny fits the bill?adjective. Under a microscope, yet too small to be seen by the unaided eye. Macroscopic is compared. extremely small; minute. using, involving, or utilizing a microscope.
Which dimension is microscopic?Objects that are too small to be seen by the unassisted eye but big enough to be viewed through a bright field lens are said to as microscopic. The range is 100 um to 0.1 um, or 0.1 mm to 0.0001 millimeter.
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Answer: the microscopic structures are reproducing on their own.
What factors most influence your food choices for meals and snacks? How important are these in your food choices? Consider personal preferences, physical health, family history, nutritional needs,
There are several factors that can influence my food choices for meals and snacks. These include personal preferences, physical health, family history, and nutritional needs.
Personal preferences play a significant role in my food choices. I tend to choose foods that I enjoy and that taste good to me. I also like to try different foods and cuisines from around the world.
Physical health is another important factor that I consider when making food choices. I try to eat foods that are nutritious and provide me with the energy and nutrients I need to stay healthy. I also try to avoid foods that might be harmful to my health, such as those that are high in sugar, salt, or saturated fat.
Family history is another consideration when it comes to food choices. I tend to be mindful of any health conditions that run in my family and make sure to include or exclude certain foods to reduce the risk of developing similar conditions.
Nutritional needs also plays a role in my food choices. I try to make sure that my meals and snacks include a balance of the different food groups and provide me with the vitamins, minerals, and other nutrients that I need to maintain good health. I also consider my calorie intake and try to maintain a balance of healthy diet.
In summary, I would say that all these factors are important to me when making food choices. Each one plays a role in helping me to make decisions that are good for my health and well-being.
