Darwin theory of evolution has been criticized due to its failure to explain origin and transmission of variations.
What is Evolution?
This is defined as the changes in the heritable characteristics of a biological populations over successive generations and is usually a long period of time.
Darwin's theory of evolution states that all species arise as a result of the inherited variations which increases their chances of survival in the ecosystem as a result of the varying environmental conditions from time to time.
However this theory was criticized because there was no emphasis on the origin and transmission of variations thereby making it the correct choice.
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Systems aren't limited to Earth or physical machines. Systems are also important to life!
This model, for example, shows the human respiratory system. This system is responsible for bringing oxygen into the body and removing carbon dioxide from it.
Identify some of the parts of this system, as well as the input, process, and output.
Please make it 8 or so sentences.
The parts of the human respiratory system include nostrils, pharynx, oesophagus, trachea, bronchi and lungs. The input of air is through inhaling of oxygen from the atmosphere and output is the exhalation of CO2 into the atmosphere.
What is respiration?Respiration is a physiological process of metabolic activity. In respiration, the body cells completely breakdown glucose in the presence of oxygen and yield ATP as the source of energy.
Respiration also includes breathing - a biological and mechanical process involved in the exchange of gases in the body. The air rich in oxygen enters the body through nostrils. The CO2 produced by the metabolic activities of the cells is expelled out through nostrils into the atmosphere.
Thus, respiration is an important and vital biochemical process for the living organisms.
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explain why the offspring of a cactus finch and a medium group finch would look like an intermediate between the two birds, but the song would not be an intermediate
Answer:The offspring of a cactus finch and a medium finch show the intermediate phenotype of their beaks because of gene interaction
Explanation:
Human hairs have___ scales.
coronal
imbricate
spinous
amorphous
Answer:
The answer is imbricat
Explanation:
During times of stress, the adrenal glands secrete the hormone:_________
a) insulin.
b) dopamine.
c) serotonin.
d) cortisol.
Answer:
Adrenal glands secrete cortisol D
4. Deana is studying the table shown here, which lists the birthrate and death rate for several countries.
2014 Birthrate and Death Rate, by Country
Country
Birthrate (per 1000 People)
Death Rate (per 1000 People)
Brazil
14.7 BR
6.1 DR
Cambodia
24.1 BR
6.1 DR
Italy
8.3 BR
9.8 DR
Mali
43.5 BR
10.5 DR
Venezuela
19.6 BR
5.5 DR
4. Which conclusion is MOST strongly supported by the data in the table?
(A) The population of each country is increasing at approximately the same rate.
(B) The population of each country is increasing at different rates.
(C) Nutrition, sanitation, and medical care are about the same in each country.
(D) All of the countries except Italy have passed through the demographic transition.
(E) Italy has passed through the demographic transition, while the other countries have not yet passed
through it.
The statement that is most supported by the data is; Italy has passed through the demographic transition, while the other countries have not yet passed through it. Option D
What is population?The term population refers to the number of people that live in a place at a given time. We know that there are several factors that affects the population of a place such as access to resources, migration, birth rate, death rate etc.
Generally, the population of the world is largely on the increase and efforts are underway to stem the tide in the coming years. Looking at the data as presented in the question, the conclusion that is most strongly supported by the data is that; Italy has passed through the demographic transition, while the other countries have not yet passed
through it.
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A number of chemical treatments cause microtubules to fall apart. Colchicine is one such drug. What would happen if a dividing cell was treated with colchicine?.
A number of chemical treatments cause microtubules to fall apart. Colchicine is one such drug. If a dividing cell was treated with colchicine, chromosomes would not separate.
Microtubules can be defined as structures that are actively present in the cytoskeleton of eukaryotic cells.
The microtubules are a major part of the cell division process as they are involved in the formation of the mitotic spindle. This mitotic spindle ensures that the sister chromosomes are separated at the time of cell division. As a result of this segregation, there is an equal division of chromosomes among the daughter cells.
Hence, if a dividing cell was treated with colchicine, then the microtubules will fall apart. As a result of this, the mitotic spindle will not form and chromosomes will not separate.
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the polymer that has phosphorus in it's essential structure is ?
Haploid refers to organisms with:
Answer:
Explanation:
Half the number of chromosomes because hap means half
Answer: That have half the number of chromosomes
Explanation:
Haploid describes a cell that contains a single set of chromosomes. The term haploid can also refer to the number of chromosomes in egg or sperm cells, which are also called gametes. In humans, gametes are haploid cells that contain 23 chromosomes
A physical model is often used to show the complex structures that exist in
many cells. Which sentence best describes a benefit of using a model of a
cell?
OA. It simulates the way a cell lives and grows.
OB. It shows details about a system too small to be easily studied.
OC. It shows the structures exactly as they appear in all cells.
D. It highlights the various cell structures but not their functions.
Answer:
the answer is b.Explanation:
A mediated immune response that is effective against extracellular antigens, such as bacteria, viruses, and toxins when they are outside the cell is called a(n)?
A mediated immune response that is effective against extracellular antigens, such as bacteria, viruses, and toxins when they are outside the cell is called antibody.
What is an antibody?
An antibody is a protein-based element of the immune system that travels through the blood and detects and destroys foreign entities like bacteria and viruses. Antibodies remain in circulation in the blood after exposure to an antigen, acting as a defense against additional exposures to that antigen.
A component of the host cell's defense is the antibody. It is produced by a particular kind of white blood cell known as a B cell. Two light chains and two heavy chains make up the antibody's structure, and at its very tip is a hypervariable area that enables the antibody to produce a variety of antibodies that will react to all of the antigens that may attack the body.
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Proteins in the plasma membrane are often the target of medicines. discuss why you think this is the case.
Targeting the proteins in the plasma membrane does not require the drug taken up into the cell.
The cell membrane or plasma membrane is the outer covering of the cell. It is selectively permeable which does not allow every molecule to pass through it. It only allows some selective organic molecules to enter or exit through it. It, therefore, does not allow medications to pass thorough it or alter its chemical composition. Rather the medications target the proteins there to allow their functioning.
Plasma membrane proteins transmit the signals into the cell and catalyze reactions. The chemical composition of a drug is altered by the plasma membrane and a more acceptable form is produced to facilitate absorption by the desired organ. It also performs the distribution of drugs to various organs to produce the desired therapeutic effect.
Because not all drugs or medications are natural or organic molecules, they can't enter the cell. Therefore, any medication or drug targets the proteins in the plasma membrane.
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Calculate the solute potential of a 0.2M NaCl solution at 30°C. Find your answers in bars.
The solute potential of a 0.2M NaCl solution of 30⁰C and the bars Ѱs = - 10.07172 bars.
Given:i = 2,
C = 0.2 (mol/L).,
R = 0.0831 L·bars/mol·K,
Formula for solute potential
Ѱs = -iCRT
The formula Ѱs = - iCRT can be used to determine solute potential. As long as there are solutes in solution, the solute potential is negative. The number of ions that the solute dissociates into is indicated by the letter ‘i’ the solute potential decreases when the solution can split into more ions.
To find T,
The Kelvin unit of measurement, "T," is equal to 273.15 plus the temperature in degrees Celsius.
T = 30°+273.15
= 303.15.
It can be expressed as either 0.00831 (liters times megapascals over moles times Kelvin) or 0.0831 (liters times bars over moles times Kelvin).
Ѱs = - (2) (0.2) (0.0831) (303.15)
Ѱs = - 10.07172 Bars
With an increase in solute concentration, solute potential (s) drops; this results in a decrease in total water potential (s).
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Higher mental functions that distinguish humans from other species are localized in the brain’s.
Higher mental functions that distinguish humans from other species are localized in the brain’s cerebral cortex.
The frontal lobes are considered the largest lobes present in the cerebral cortex. Behind the forehead, they are located at the front of the brain. The main function of the frontal lobe mainly involves higher cognitive functions as in general they include decision-making, conscious thought, attention as well as problem-solving.
Since the cerebral cortex is located on the outer surface of the brain, the major functions really associated with it are consciousness, thought, emotion, reasoning, language as well as memory which is a higher-level process.
The neurons present in the cerebral cortex mainly constitute a very high level of control in the nervous system hierarchy.
So, humans are distinguished from other species by high mental functions which are located in the cerebral cortex of the brain.
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Please help before 11:00 it’s for my cousin . Question: You are planning a trip to another continent. You want to see which countries you might be able to visit on your trip. What kind of map do you use and why?
Answer:
A world map possibly
Explanation:They show all of the other countries and what water they are near
What do you have to do to 'unmix' molecules? What would you end up with?
Answer:Filtration. One of the simplest methods used to separate mixtures is filtration. ...
Distillation. When one compound is dissolved in another, or when two liquids are mixed together, the most commonly used method to separate them is distillation. ...
Chromatography. ...
Extraction.
Explanation:
William is developing the model shown below to illustrate the process of photosynthesis. He plans to use the model to explain how photosynthesis transforms both energy and matter.
To revise the model, William wants to use color to identify the reactants of photosynthesis. Which labels should he color? Select all that apply.
William can use Green shades for chloroplasts & Chlorophyll, Blue for water, Yellow for Light and Brown for Gases.
With the aid of carbon dioxide and water as reactants, photosynthesis is the process that transforms light energy into chemical energy stored in the form of sugars. Carbon is removed from the atmosphere via photosynthesis, transported to the geosphere, and then absorbed by plants. Four steps/processes can be used to objectively divide the total photosynthetic process:
The taking up of light. Chlorophylls connected to proteins in the thylakoids of chloroplasts absorb light as the first stage in photosynthesis. Transfer of electrons, production of ATP, and carbon fixation. A reaction that is endothermic is photosynthesis. This indicates that without energy, it cannot happen (from the Sun). Chlorophyll, a green pigment found in leaves, absorbs the needed light. The palisade and spongy mesophyll cells of plants include chloroplasts, which contain chlorophyll.Learn more about photosynthesis
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In the larval stage, females in most species of bees can develop into a queen or a worker, depending on the food they received. If only 0.01% of females develop as a queen, what percentage are coerced into becoming worker bees by the queen limiting their food?
If only 0.01% of females develop as a queen, 85 percent are coerced into becoming worker bees by the queen limiting their food.
All female larvae younger than three days can develop into a queen, however, the youngest larvae, those younger than one day, create larger, more robust queens. Younger larvae have a greater chance of receiving the best nutrients and developing to their full potential because they receive more royal jelly throughout their development when they are chosen to become queens.
On the other hand, on the third day, worker-destined larvae switch to a "worker jelly" diet. Royal jelly, pollen, and nectar are all components of worker jelly. While larvae fed just worker jelly grow into sterile workers, those fed only royal jelly mature into fertile queens.
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Isotopes of carbon differ with respect to the number of _________. protons neutrons electrons
Carbon isotopes differ in terms of the number of neutrons, according to the stated statement.
The correct option is B.
What exactly are isotopes?Isotopes are elements that share a common atomic number but differ in terms of atomic mass. Isotopes are simply alternate versions of chemical elements found in nature. The number of molecular constituents affects the atomic mass.
What exactly are neutrons?The neutron is an elementary particle with the sign n or n0 that has a neutral charge and a slightly larger mass than a proton. Atomic nuclei are contains of protons and neutrons.
What is the significance of the neutron?With the possible exception of the solitary hydrogen nucleus, nuclei require neutrons to be stable. Neutrons are abundantly created during nuclear fission and fusion. Through fission, fusion, as well as neutron capture processes, they are a major contributor to the nuclear reactions of chemical elements inside stars.
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I understand that the question you are looking for is:
Isotopes of carbon differ with respect to the number of _____.
a. protons.
b. neutrons.
c. electrons.
is Monitoring the appearance of oil- based compounds in the marine food chain
and food web apart of environmental scince
The drug colchicine inhibits the formation of spindle fibers during mitosis. If you treat dividing plant cells with colchicine, what would you expect the result to be?.
The drug colchicine inhibits the formation of spindle fibers during mitosis. If you treat dividing plant cells with colchicine, A cell that divides has half as many chromosomes as it would otherwise have since the chromosomes are divided in half.
Colchicine is a medication that prevents the development of spindle fibers during mitosis. A cell that divides has half as many chromosomes as it would otherwise have since the chromosomes are divided in half.Since colchicine's prevent the formation of spindle fibers, which are primarily responsible for guiding the chromosomes toward the poles during anaphase, Therefore, cells treated with colchicine will begin the cell cycle but will be stopped at metaphase.learn more about Colchicine here: https://brainly.com/question/15704528
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what part of the cell membrane allows the cell to exist in water
Answer:
Hydrophilic "head" region
Explanation:
Answer:
Hydrophilic "head" region
Explanation:
Try to get the web for info
How do nutrients move in the ocean as a result of upwelling?
A. from deep, cold areas to warm, shallow areasB. from warm, shallow areas to deep, cold areas
C. from the neritic zone to the intertidal zone
D. from the ocean floor into estuaries
The spindle structure forms during:
Answer: A Mitosis Only
Explanation:
Answer:Your answer is the second one.
Explanation:
Margaret is born with double jointed elbows. what is this an example of?
a. a dihybrid
b. cross codominance
c. a genotype
d. a phenotype
Margaret is born with double jointed elbows. This is an example of d. a phenotype.
In the field of genetics, phenotype can be described as the observable traits that can be seen in an organism. These traits occur as a result of gene expression. For example, eye color, hair color, face structure etc are the phenotype of a person.
The double-jointed elbows are the phenotype that occurs as a result of a fault in the genotype. As the double jointed elbows are observable, hence they are the phenotype.
Other options, such as genotype, is not correct as the genotype here will be the fault in the gene which resulted in the above disorder. The resulting disorder will be the phenotype.
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Ovules from a pure-breeding green plant are fertilized with pollen from a pure-breeding yellow plant. All of the progeny are green. When the reciprocal cross is performed, all of the progeny are yellow. What do these results suggest?.
When the reciprocal cross is performed, all of the progeny are yellow. Color is inherited from the mother.
How do progeny cells work?Bacterial Structure Represented by a Diagram. An undifferentiated cell called a stem cell has the capacity to proliferate and give rise to both stem cells that will remain and cells that will differentiate (become specialized).
When an organism reproduces asexually, the resultant offspring are regarded clones because they are identical to the parent organism, however when an organism reproduces sexually, the offspring are similar to their parents because they receive the genetic material from both parents.
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The traits of a certain dolphin are shown.
Which of these traits is not inherited?
OPTIONS
Blowhole, for breathing
Long, rounded snout
Broad, flat tail
Scars from motor boat
Which statement explains the role of genes in the process of inheriting a specific trait?
OPTIONS
Genes are changed by the environment of a living thing, and these changes affect the genes of their offspring.
Genes in living things come together to make chromosomes, which take information from offspring to parent.
Genes, which are passed from both parents, carry the genetic material that determines inherited traits.
Genes absorb chemicals from the bloodstream and carry them throughout the body of parents and offspring.
The genetic makeup of an individual, including the exact versions of each gene they carry, is called the genotype. A mother has curly hair, and the father has straight hair. Their offspring has curly hair. Which of the following must be true regarding the genotype that codes for hair?
A drug with a half-life of 4 hours is administered at a dosage of 100 mg. how many milligrams of the drug will be in the client's system 8 hours after administration?
25 milligrams of the drug will be in the client's system 8 hours after administration.
What is the half-life of a drug? The period of time it takes for a drug's active ingredient to decrease by half in your body is known as the half-life. This is dependent on how the body breaks down and eliminates the substance. It could last a few hours, a few days, or even a few weeks.Why is a drug's half-life significant?For any particular drug, understanding the idea of half-life is helpful in calculating steady-state concentrations and excretion rates. Although different medications have varied half-lives, they always adhere to the same principle: 50% of the initial drug dose is eliminated from the body after one half-life.To learn more about half-life drug visit:
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Explain why the heart rate and finger pulse change during a valsalva maneuver. Include in your explanation how changes in arterial blood pressure, peripheral resistance, and autonomic nervous activity bring about these responses.
The heart rate and finger pulse change during a valsalva maneuver due to changes in arterial blood pressure, peripheral resistance, and autonomic nervous activity.
Arterial blood pressure changes during a valsalva maneuver due to the increased pressure in the chest from the contraction of the abdominal muscles. This increased pressure squeezes the heart and reduces the amount of blood that returns to it. The heart then has to work harder to pump blood, which increases the heart rate.
Peripheral resistance changes during a valsalva maneuver due to the increased pressure in the chest and abdominal muscles. This increased pressure squeezes the blood vessels and reduces blood flow. The body then has to work harder to pump blood, which increases the peripheral resistance.
Autonomic nervous activity changes during a valsalva maneuver due to the increased pressure in the chest and abdominal muscles. This increased pressure activates the sympathetic nervous system, which increases heart rate and blood pressure.
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All of the following would contribute to a sustainable future except
1. divesting in fossil fuels
2. constructing "green buildings"
3. investing in renewable energies
4. lowering the federal tax on gasoline to lessen the financial burden on citizens
Answer:
4. Lowering the federal tax on gasoline to lessen the financial burden on citizen
Explanation:
Lowering the tax on gas would lead to more gasoline consumption which would not lead to a more sustainable future
An infant has learned to use a baby spoon and now picks up a regular metal spoon. Her initial attempt to grasp the spoon is clumsy and reflects the process of __________. She makes subtle adjustments to her grasping movements, which reflects the process of __________.
An infant has learned to use a baby spoon and now picks up a regular metal spoon. Her initial attempt to grasp the spoon is clumsy and reflects the process of assimilation. She makes subtle adjustments to her grasping movements, which reflects the process of accommodation.
Learning to use a spoon is just as vital as learning to self-feed with your fingers. It's a developmental milestone that children reach shortly after finishing the first year and master by the age of two. Children could prefer using their fingers because they receive safe-feeling input through their skin, muscles, and joints. With a spoon, the mouth, lips, and tongue are largely used for feedback.
She begins by using established frameworks to explain the experience of taking up the spoon (assimilation). Then, she can adjust her current plans to match the experience of using a new spoon (accommodation.)
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