Answer:
In order to perform karyotype analysis, chromosomes are obtained from actively dividing cells and treated with chemicals to keep them at the _metaphase_ stage of mitosis.
Explanation:
A phase of cell division known as "metaphase" (mitosis or meiosis). Many chromosomes are often spread throughout the cell nucleus. The cell's chromosomes compress and migrate toward one another, uniting in the center of the dividing cell, while the nucleus of such cell disperses during metaphase. All chromosomes may now be identified when examined under a microscope. During karyotyping, a clinical method for detecting chromosomal mutations, metaphase chromosomes are usually utilized. Several more years earlier we realized what kind of material was, the ability of the microscope to observe chromosomes during metaphase enabled us to recognise them as having genetic information. Later research revealed both DNA and protein makeup chromosomes and also that DNA encodes the genetic information contained inside them.
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Which of the following phrases correctly describes exponential growth?
A: Growth whose rate decreases as the population reaches carrying capacity.
B: Growth whose rate becomes ever more rapid in proportion to the growing total number or size.
C: Growth that starts increasing but then rapidly decreases
Which one is the correct answer
The answer happens to be B.
Describ how matter moves throghout the owl’s food web.
Plants absorb the nutrients through their roots. When main consumers eat the plants, the nutrients are transferred to them. When higher level consumers eat lower level consumers, the nutrients are transferred. The cycle is repeated after death.
What is a Food web ?All the food chains in one ecosystem are combined to form a food web. Every living organism in an ecosystem is connected to several different food chains. Each food chain represents a potential route that energy and nutrients could follow as they circulate throughout the ecosystem.
The sum of all the food chains in an ecosystem is known as a food web. A mouse eating a plant and then getting eaten by an owl might be an example of a regular food chain. But the mouse isn't the only one consuming the vegetation. Probably a wide variety of creatures are devouring them.Learn more about Food web here:
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Ash from ancient volcanoes blanketed the serengeti plain millions of years ago, helping to preserve in place what kind of record related to human evolution?.
The Laetoli footprints were formed and preserved by a combination of events which are volcanic eruption, a rainstorm, and another ashfall .
The Laetoli footprints were most likely formed by Australopithecus afarensis, an early humans whose fossils were found in the same sediment layer. The entire footprint trail is almost 27 m long and includes impressions of about 70 early human footprints.
The Laetoli Footprints provided convincing evidence of bipedalism in Pliocene hominids based on analysis of these impressions. The footprints and skeletal structure excavated at Laetoli showed clear evidence that bipedalism preceded with enlarged brains in hominids.
fossils were formed 3.6 million years ago in Laetoli, Tanzania, where three early humans walked through wet volcanic ash and When the nearby volcano erupted again, subsequent layers of ash covered and preserved the oldest known footprints of early humans.
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Used to make proteins and nucleic acids - DNA and RNA -
which control cell function and are inherited by offspring.
Explanation:
RNA is used to make proteins and nucleic acids
DNA controls cell function and are inherited by offsprings
Chemicals such as PBDES are present in the Great Lakes and are toxic when absorbed by humans. Which human health effect is a result of the PBDES in the Great Lakes? Decreased cancer Increased fertility O Decreased eating disorders O Increased birth defects
Human study indicates that P BDEs have an effect on children's neuro development, including decreased attention, increased im pulsivity, and cog nitive development (comprehension, memory).
How might flame re tardants P BDEs affect humans again based on animal studies?Poly brominated diphenyl ethers, or P BDEs, have been associated in experimental animal and human research to thy roid , memory and learning difficulties, delayed mental and physical development, lower IQ,
People can be exposed to P BDEs through eating con taminated foods, particularly those high in fat, such as fish. Exposure occurs when you breathe polluted air or consume con taminated dust.
In the industrial mixtures where they are generally produced, P BDEs may be present in a number of combinations. P BDEs are used as flame re tardants to keep fires from beginning and spreading fast.
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Answer:
increased birth defects
Explanation:
tundra how it moves with carbon through the geosphere ?
Northern tundra and boreal ecosystems typically gain carbon (carbon sink) stored in plant biomass and new soil organic matter during the short summer growing season when plant photosynthesis and growth is greater than carbon respired by plants and soil back to the atmosphere.
How does carbon reach the geosphere?Carbon enters the geosphere through the biosphere when dead organic matter (such as peat or marine algae) becomes incorporated into fossil fuels like coal and organic-matter-rich oil and gas source rocks, and when shells of calcium carbonate become limestone through the process of sedimentation briefly described above.
What is carbon dioxide?Carbon dioxide is a chemical compound made up of two oxygen atoms and one carbon atom. The chemical representation is CO₂. Carbon dioxide was discovered by Scotsman Joseph Black in 1754. Structurally, carbon dioxide is made up of molecules of linear geometry and non-polar character.
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Which organisms are affected most by biological magnification? A plants B algae C mice D wolves
Answer:D
Explanation:
The scatterplot shows how much ice cream people consume in relation to outside temperature.
Which conclusion or inference is best supported by the data?
A.No one eats ice cream when the temperature is below 40°F.
B.Temperature affects the amount of ice cream people eat.
C.People get tired of eating so much ice cream in the summer months.
D.It has to be above 50°F for a person to eat more than 0.35 pints of ice cream.
A rain shadow is where a single rainy cloud blots out the sun in an otherwise sunny day, making a rainbow. True or false
The rain shadow is the dry slope of a mountain that is protected from predominant winds and rains. Usually, it is characterized by desertic conditions. The statement is false.
What is the rain shadow?A rain shadow is a meteorological event that occurs when dense clouds, driven by predominant winds, meet one side of a mountain. Rain occurs on this side, while the other side of the mountains remains dry.
The rain shadow is the dry slope of the mountain, which is protected from predominant winds in mountain chains. When referring to predominant winds, we mean the direction of winds that occurs more often in the affected region.
Usually, rain shadows are associated with desertic regions, because only dry winds reach these areas. Poor vegetation inhabits there.
According to this framework, the statmente is FALSE.
A rain shadow is NOT where a single rainy cloud blots out the sun in an otherwise sunny day, making a rainbow.
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Assessing spinal nerve damage may involve the use of a vibration fork that is tapped along segments of the spinal nerve pathway. which type of sensory receptor detects vibrations?
A vibration fork that is tapped along sections of the spinal nerve system can be used to evaluate spinal nerve injury. Vibrations are detected by tactile receptors, a type of sensory receptor.
What is a spinal nerve?In order to modulate motor and sensory information from the body's periphery, spinal nerves, which are mixed nerves, directly communicate with the spinal cord. Each nerve is made up of fila radicular, or nerve fibers, that originate from the ventral and dorsal roots of the spinal cord. A spinal nerve is a mixed nerve that connects the spinal cord to the body and conveys motor, sensory, and autonomic signals. There are 31 pairs of spinal nerves in the human body, one on per side of the vertebral column. The combination of nerve fibers from the dorsal and ventral roots of the spinal cord creates each spinal nerve. Efferent motor axons are carried via the ventral roots.To learn more about spinal nerve, refer to:
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Which structures are found in all types of cells?
Cell wall & nucleus
Cell membrane & cytoplasm
Chloroplasts & cell wall
Chloroplasts & Mitochondria
Answer:
The cell membrane, ribosomes, cytoplasm, and DNA.
which of these measurements would not be used to measure relative distance?
A. Hours
B. Effort
C. Dollars
D. Miles
E. Minutes
Answer:
The answer to this is D. Miles
Does density change with size?
Answer:
No
Explanation:
the size or amount of a material/substance does not affect its density.
two neutral conditions that might cause plant cells to become plasmolysed
Answer:
The vacuoles, a fluid-filled membrane-bound organelle, located within the cytoplasm, holds the water in the plant cell. In certain conditions, plant cells do not get a sufficient amount of water, or there is a severe loss of water from the cell. This results in the total shrinkage of the plant cell and the phenomenon are called plasmolysis.
Explanation:
On what basis are enzymes and proteins with allosteric properties different from those without allosteric properties?
Enzymes and proteins with allosteric properties different from those without allosteric properties are different based on their different dependence on substrate concentration.
Enzymes with an extra binding site for effector molecules outside of the active site are referred to as allosteric enzymes. Its catalytic capabilities change as a result of conformational changes brought on by the binding. Either an inhibitor or an activator may be the effector molecule.
When compared to other enzymes, allosteric enzymes stand out because of their distinctive features, which enable them to adapt to a variety of environmental situations. The unique characteristic of allosteric enzymes is the presence of an additional, substrate-binding allosteric site on top of their active site. Also, allosteric enzymes and protein enzymes can be distinguished on the basis of their dependency on the substrate as the allosteric enzymes can undergo conformational changes too and can bind to different substrates but those with protein structure will depend on one only.
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The endocrine system is responsible for hormone synthesis and secretion in animals. What types of organelles would you expect to find in great number in endocrine cells?.
Answer:
Organelles of the endomembrane system
Explanation:
A(n) _____ is a group of three bases on trna that is complementary to a specific mrna codon. poly-a tail cap codon anticodon
A(n) anticondon is a group of three bases on trna that is complementary to a specific mrna codon. poly-a tail cap codon anticodon
The main function of an anticondon is to form a pair with the condom by mating in order to form an RNA chain, this chain is a sequence of three nucleotides that form a unit of genetic code in a transfer RNA molecule.
What is molecule?It is the union of two or more atoms by chemical bonds, conserving the physical and chemical properties of that substance.
For example: the water molecule is H2O.
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What does a messenger molecule bind with to cause some effect on the target cell?
Messenger molecule bind with specific target proteins, to cause some effect on the target cell.
Target proteins are useful biomolecules that biologically active substances interact with and regulate. They are utilized during the transduction, transformation, and conjugation processes. An developing therapeutic approach known as targeted protein degradation (TPD) has the potential to address disease-causing proteins that have hitherto been very difficult to target with traditional small molecules. Proteases, kinases, G protein-coupled receptors (GPCRs), and nuclear hormone receptors are currently the protein targets for which effective medicines have been produced.Typically bioactive small compounds are coupled onto solid supports and then used to separate target proteins from the entire proteome for target protein identification. High binding affinity between bioactive small molecules and their intended protein targets is necessary for this method.learn more about specific target proteins here: https://brainly.com/question/27300629
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a person studying a topic is presented with new information that conflicts with previous findings. what would a scientist do in this situation
A person studying a topic in research is presented with new information and should evaluate the new information that conflicts with previous findings.
Scientific research is the practical application of a collection of systematic procedures for examining data and phenomena that a researcher uses to create a study.
The primary feature that distinguishes this research from others is its severe discipline, which is evident in the way it adheres to the formal guidelines of the processes to gather the required data and develop the hypotheses that underpin the analysis the researcher made.
As a result, if the researcher uncovers contradictory material that does not corroborate the earlier discoveries, he must assess it in order to determine if it is real or false, allowing science to advance with accurate knowledge.
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1
A.
B.
C.
Prokaryotic cells and eukaryotic cells are alike in
that they
have nuclei that are larger than their
mitochondria.
contain DNA that is coiled around histones.
have irregular, asymmetrical shapes.
D. contain many types of proteins.
4 As
is
m
F
Answer:
contain many types of protein F
How much of the fluid that comprises filtrate is reabsorbed into the bloodstream?
99 percent of the fluid that comprises filtrate is reabsorbed into the bloodstream.
This filtrate contains anything that is small enough to pass through the capillaries' pores and escape. Bowman's capsule absorbs the filtrate and passes it back into the renal tubule. Many of these compounds that the body actually wishes to maintain are predominantly recovered by the proximal convoluted tubule, which is the initial portion of the renal tubule.
In actuality, around 99% of the substances that are filtered out of the glomerulus are actually reclaimed by the nephron and placed back into the blood stream. These compounds include glucose, amino acids, and ions.
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Glycosuria would occur if the ________ of the renal glucose transport protein is exceeded.
Glycosuria would occur if the Transport maximum and saturation level of the renal glucose transport protein is exceeded.
The presence of reducing sugars in the urine, such as glucose, galactose, lactose, fructose, etc., is known as glycosuria. The most common kind of glycosuria, glucosesuria denotes the presence of glucose in the urine and is the subject of this review.When someone has glycosuria, their urine includes more sugar, or glucose, than is normal. Usually, renal damage or excessive blood sugar levels are to blame. One typical sign of both type 1 and type 2 diabetes is glycosuria. Renal glycosuria happens when the kidneys of a person are harmed. The glomeruli remove 180 grams of glucose every day from plasma, and all of it is reabsorbed by means of glucose transporter proteins found in cell membranes.learn more about here: https://brainly.com/question/7727285
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Energy is received from carbohydrates, proteins and fats in the foods we eat. These nutrients provide calories, which are listed on food labels as what?.
Energy is received from carbohydrates, proteins, and fats in the foods we eat. These nutrients provide calories, which are listed on food labels as nutrition facts.
Humans need the energy to perform different functions and physical activities.
The requirements of energy are fulfilled by the food that we consume in the form of carbohydrates, fats, and proteins.
A nutrition fact label is a label that lists all the necessary nutrients, the number of calories, and the serving size.
In many countries, the fact label is provided on the food packaging indicating the number of nutrients and other ingredients which are present in the food.
Furthermore, such nutritional guides are only for educational purposes and to let the consumers know about the quality and quantity of nutrients they are consuming through foods.
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Which step in a comparative investigation is not included in a descriptive
investigation?
A. Asking questions
B. Collecting data
C. Comparing or contrasting
D. Making observations
comparing and contrating
The heart pumps about __________ liters of blood a day and contracts about __________ times in a lifetime.
The heart pumps about 5 litres of blood a day and contracts about 3 billion times in a lifetime.
What are the main functions of heart ?1) Pumping oxygenated blood to other parts of body.
2) Maintains blood pressure.
3) It pumps hormones and other substances to different parts of the body.
4) Receiving deoxygenated blood and it carries metabolic waste products from the body and Pumping it to the lungs for oxygenation.
The heart pumps 5 liters blood in a day and contracts about 3 billion times in a lifetime .
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What are the three types of protein structures that contribute to the cytoskeleton?.
Actin filaments (also known as microfilaments), microtubules, and intermediate filaments make up the cytoskeleton's three primary structural elements.
They each have a unique structural makeup and perform somewhat different but related roles.
What three types of cytoskeleton structures are there?Microfilaments, cytoskeleton, and gap junctions make up the cytoplasm of a cell. These elements aid in the organisation of the cell's components and give the cell its form. They serve as a foundation for cell division and mobility as well.
Three main kinds of protein components make up the cytoskeleton. The microfilaments (actin filaments), intermediate filaments, and microtubules are arranged from narrowest to broadest. Myosin is frequently related to microfilaments.
Actin monomers make up microfilaments, whereas intermediate filaments are made up of intermediate filament protein subunits. Microtubules are composed of beta and gamma tubulin dimers.
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In a cross between a homozygous red-eyed female fruit fly and a white-eyed male fruit fly, what is the expected outcome?.
All offspring will have red eyes because red is dominant and white eye color is a recessive trait.
What are dominant and recessive alleles?In genetics, when one allele is overriding the effect of another allele of the same gene, then it is called a dominant allele. While recessive alleles are those alleles that can not express themselves in the presence of a dominant allele.
Recessive traits can be expressed only when both alleles are recessive and homozygous, while dominant alleles can express themselves in both homozygous and heterozygous conditions.
In Drosophila melanogaster commonly known as the fruit fly, red eye color is dominant, and white eye color is recessive. So, Whenever a gene contains one red allele and one white allele, then red color dominates white eye color. Hence, all offspring will have red eyes.
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A mutation that occurs in a sperm cell has the potential of being passed on to the next generation. True or false
Answer:
true
Explanation:
a mutation and a sperm cell will pass on to the next generation because the jeans from the sperm cell are mutated and will
compare the amount of dna at the beginning and end of synthesis
El ciclo celular es un conjunto ordenado de eventos que hacen que una célula crezca y se divida en dos células hijas. Los estadios son: G1-S-G2 y M. El estado G1 significa "BRECHA 1" (Brecha 1). El estado S representa la "síntesis" donde se produce la replicación del ADN. El estado G2 significa "GAP 2" (Brecha 2).
what are 10 important facts about plant cells
Answer: 1. Plants cannot make their food without plant cells and their features.
2. Chlorophyll this the part of the plant cell that can trap that energy.
3. Plant cell plays an important role in plant adaption.
4. Plant cells and animal cells are almost similar in terms of structure.
5. Plant cell is extremely small. Can only be seen by a microscope.
6. Cell is the smallest unit part of plants, animals, and all other living things.
7. A nucleus known as a brain or control center of the cell. It gives instructions to cell how to work and grow.
8. Plants retain a definite shape due to the rigid cell wall
9. Plants contain guard cells usually occur in the epidermis of plant leaves or stems.
10. Guard cells help balance the amount of carbon dioxide being absorbed and the water lost through evaporation.
Explanation:
