Which of the following statements best explains why the energy pyramid is narrowest at the top?
A The organisms at the top of the pyramid have the largest population sizes
B The organisms at the top of the pyramid receive only a small fraction of the energy that originally enters the system,
The organisms at the top of the pyramid are the most efficient feeders.
The organisms at the top of the pyramid need only a small amount of energy for their metabolism
Answers
Answer:
The answer is B
Explanation:
It is B because of how about 10% of the energy is lost each time the energy is passed to the next organism.
Related Questions
92ml 3.0 fl oz what is the ratio
Answers
The ratio between 92 mL and 3.0 fl oz is 46 : 44, or it can be further simplified to 23 : 22.
To find the ratio between 92 mL and 3.0 fl oz, we need to convert the units to a common measurement. Let's convert 3.0 fl oz to milliliters (mL).
1 fluid ounce (fl oz) is equal to approximately 29.5735 milliliters (mL).
Therefore, 3.0 fl oz is equal to 3.0 * 29.5735 = 88.72 mL (rounded to two decimal places).
Now we can express the ratio between 92 mL and 88.72 mL:
92 mL : 88.72 mL
Simplifying the ratio by dividing both sides by the greatest common divisor, we get:
46 : 44
So, the ratio between 92 mL and 3.0 fl oz is 46 : 44, or it can be further simplified to 23 : 22.
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Which organism can help in different
ways such as helping make vitamins,
digesting food, and creating a
healthier environment?
A. virus
B. infection
C. bacteria
4
Answers
Answer: C. Bacteria
Explanation:
Answer:
I believe the answer is C.
Explanation:
C: Bacteria
For children from two to five, chikcare spaces are best organized into centers for play.
True or false ?
Answers
Answer:
True
Explanation:
True or False: Coal is the cheapest available source of energy.
True
False
Answers
Answer:
True
Explanation:
A coal is cheapest or least expensive among non- renewable energy.
... But it is not the cheapest among all because solar energy, wind energy etc
what is signal transduction?
Answers
Answer:
Signal transduction is the process by which a chemical or physical signal is transmitted through a cell as a series of molecular events, most commonly protein phosphorylation catalyzed by protein kinases, which ultimately results in a cellular response.
Explanation:
describe how impulse are transmitted across a synapse
Answers
A tiny electric message moves through a long part of a brain cell called the axon. When a message goes to the end of a nerve, it sends chemicals called neurotransmitters. These substances move through a tiny gap and attach to special parts of another nerve cell's outer covering.
What are the impulse?Messages called impulses are sent from one nerve cell to another through a connection called a synapse. This process is called synaptic transmission. Synapses are connections between nerve cells or between nerve cells and other cells, like muscles or glands.
The neuron sending the signal is called the presynaptic neuron. When a signal travels down a nerve cell, it causes little sacs called vesicles to release chemicals called neurotransmitters.
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Choose all the answers that apply.
The cell wall _____.
A.) is thick and rigid
B.) is made of cellulose
C.) does not allow the transport of chemicals
D.) is only present in animal cells
E.) supports and protects the cell
Answers
Answer:
The cell wall is thick and rigid, made of cellulose, and supports and protects the cell.
Help please ! Thanks
Answers
Answer:
75%
Explanation:
The allele for purple flowers (capital P) is dominant.
The allele for white flowers (lowercase p) is recessive.
If one allele is capital P, it doesn’t matter if the other allele is another capital P or a lower case p, the capital P will dominate and purple flowers will show up.
The Punnett Square shows:
PP, Pp, Pp, and pp
• 3 of the offspring have at least one dominant and capital P, so purple flowers show up.
• 1 of the offspring has two lowercase and recessive alleles (p), so white flowers show up.
3/4 or 75% of the offspring will have purple flowers.
\(\huge\boxed{Option A}\)
_____________________________________ PEA PLANT:Pea plant has purple color flowers dominant over white color flowers.
Purple flower dominant allele is P
White Flower recessive allele is p
We would get White flower pea plant only when the recessive allele is in HOMO.ZYGOUS condition
_________________________________________________________
CONDITIONS:Hom.ozygous Dominant Alleles: PP (Purple Flower)
Heter.ozygous Dominant Alleles: Pp Purple Flower)
Hom.ozygous Recessive Alleles: pp (White Flower)
____________________________________ CROSS:Whenever we cross Heterozygous Dominant(Pp) purple flower with another Heterozygous dominant (Pp purple flower), we get 75% of the flowers PHENOTIPICALLY(physical appearance) white flowered, and 25 white flowered Because as you can see in the picture,
The P1 is Pp
The P2 is Pp
When we cross them,
It has 4 offsprings,
PP Hom.ozygous Purple flower
Pp Heterozygous Purple flower
Pp Heterozygous Purple flower
pp Hom.ozygous white flower
Thus the answer is 75% as there are phynotypically 3 purple flowers present
_____________________________________ Best Regards, 'Borz'What contains genes that are the instructions for making proteins
Answers
Answer:
What contains genes that are the instructions for making proteins
Explanation:
The DNA code contains instructions needed to make the proteins and molecules essential for our growth, development and health. DNA? provides instructions for making proteins
DNA basically contains genes that are the instructions for making proteins.
What is the process of making a protein known as?The process of making a protein is known as protein synthesis. Through this mechanism, each cell synthesizes protein which is extremely responsible for metabolic functions. The process of protein synthesis is accomplished within two steps, i.e:
Transcription.Translation.During transcription, a cell makes an RNA copy in the form of messenger RNA (mRNA) of a piece of DNA. This process occurs in the nucleus of the cell. While during translation, information encoded in messenger RNA (mRNA) directs the addition of amino acids during protein synthesis. This process occurs in the cytoplasm of the cell.
Therefore, DNA basically contains genes that are the instructions for making proteins.
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Scientists identify hazards and assess exposure in the process of __________.
a.
toxicity studies
b.
risk assessment
c.
risk characterization
d.
toxic assessment
e.
toxic dosage
Answers
Answer:
b. risk assessment
Explanation:
risk assessment is the "process of gathering data and making assumptions to estimate short- and long-term harmful effects on human health or the environment from exposure to hazards associated with the use of a particular product or technology."
source: https://quizlet.com/2545977/aae-apes-unit-5-chapter-17-flash-cards/#:~:text=(risk%20communication).-,risk%20assessment,See%20risk%2Dbenefit%20analysis.
why do researchers use rrna in investigations of relationships between taxa that diverged hundreds of millions of years ago? see concept 26.4 (page) view available hint(s)for part a why do researchers use rrna in investigations of relationships between taxa that diverged hundreds of millions of years ago? see concept 26.4 (page) rrna changes at different rates in different taxa. dna coding for rrna changes relatively slowly. rrna is traditionally the nucleic acid chosen for recent comparisons. rrna cannot mutate. rrna is never the nucleic acid chosen for comparisons.
Answers
DNA coding for rRNA changes relatively slowly. Hence, the correct option for this particular situation is (b).
Ribosomal RNA (rRNA) is a type of RNA that is a fundamental component of the ribosome, which is responsible for protein synthesis in all living organisms. The rRNA genes are highly conserved and found in all living organisms, making them useful for investigating relationships between taxa that diverged hundreds of millions of years ago.
The rate of evolution for rRNA varies among taxa, but overall it changes relatively slowly compared to other regions of DNA. This slow rate of evolution makes it particularly useful for investigating evolutionary relationships between distantly related taxa, as changes in the rRNA sequence can be used to infer the time since the taxa diverged from a common ancestor. Moreover, because the rRNA sequence is relatively conserved, it is less likely to be affected by convergent evolution, where unrelated organisms develop similar traits due to similar environmental pressures.
In summary, researchers use rRNA in investigations of relationships between taxa that diverged hundreds of millions of years ago because it changes relatively slowly compared to other regions of DNA, making it a useful tool for inferring evolutionary relationships between distantly related organisms.
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Question - why do researchers use rrna in investigations of relationships between taxa that diverged hundreds of millions of years ago? (a) rRNA changes at different rates in different taxa. (b) DNA coding for rrna changes relatively slowly. (c) rRNA is traditionally the nucleic acid chosen for recent comparisons. (d) rRNA cannot mutate. (e) rRNA is never the nucleic acid chosen for comparisons. choose the correct option and explain it.
Which statement DOES NOT describe a possible function of chromosomes?
Answers
The diagram shows that a cottontail rabbit gained 400 KJ of energy when it consumed a plant. The cottontail rabbit was later eaten by a barn owl, but the owl only gained 50 KJ of energy from consuming the rabbit. Which statement best explains why only 50 KJ of energy was passed on to the barn owl?
Answers
Answer: The total energy passed from one level to the next is only about one-tenth of the energy received from the previous organism. This means that an animal eating a plant will only get about ten percent of the energy that is stored in the plant
Explanation: it may be lost as faeces, thermal energy or may not be digested properly to get the derived energy
HELPPPPPPPP!!!! what is a mutation that a polar bear can have to help conserve energy and how do genetic mutations relate to chromosomes, genes, protein, and DNA?
Answers
Answer:
wings
Explanation:
Can someone feel this chart out and give explanations. It’s on Benedict’s test, iodine test, Sudan test, and biuret test.
Answers
The biuret test is used to detect the presence of proteins in a sample. Biuret reagent is added to the sample, and if proteins are present, the copper ions in the reagent will bind to the peptide bonds in the protein, causing the solution to turn from blue to purple. The intensity of the color change is proportional to the amount of protein present in the sample.
What are Benedict’s test, iodine test, Sudan test, and biuret test?Benedict's test is used to detect the presence of reducing sugars, such as glucose and fructose, in a sample. To perform the test, the sample is mixed with Benedict's reagent and heated in a water bath. If reducing sugars are present, the solution will change from blue to green, yellow, orange, or red, depending on the concentration of reducing sugars.
The iodine test is used to detect the presence of starch in a sample. Iodine is added to the sample, and if starch is present, the iodine will bind to the starch molecules, forming a blue-black color.
The Sudan test is used to detect the presence of lipids or fats in a sample. Sudan III or Sudan IV dye is added to the sample, and if lipids are present, the dye will bind to the lipids, causing them to appear as red droplets in the sample.
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If your immune system can't actually stop you from getting ill, then why is it beneficial? Why is it evolved to work this way, instead of simply stopping every infection in its tracks?
Answers
The inmmune system is continuouly working in the human body. While no aggresive factore attacs the body the person feels no changes, however, when certain substances, germs or other factors enter the body the inmune system is activated. This happens when the body does not recognize those factores, which are called antigens.
When the inmune system is activated a number of proesses occur inside the human body. These processes generally allow the inmune system to identify the germ and learn how to fight it, so the next time the exact germ enters the body the inmune system will have information stored on how to fight it and the response will be faster.
Therefore, the first time a person encounters a certain disease he or she gets ill until the inmune system reacts and fights it. The next time the person encounters the same disease the person probably will not get sick.
The inmune system is beneficial because it allows the body to protect itself and save the information it needs to properly fight the disease in the future.
If the information on how to fight a specific germ is not available in the genetic material of the person then he or she, in orther to gain it, will eventually have to get ill or get vaccinated.
If each person inherits two copies of any given gene from their parents, those who inherit two copies of the same gene variants are known as homozygous individuals. Those who inherit two different variants of the gene are known as heterozygous individuals. Determine the zygosity of samples 1, 2, and 3. DNA sample 1 DNA sample 2 DNA sample 3 Zygosity (homo/hetero) Allele contained (TNF1 and TNF 2)
Answers
Zygosity refers to the genetic composition of an individual with regards to a specific gene, indicating whether the individual is homozygous (inherits two identical copies of a gene) or heterozygous (inherits two different copies of a gene).
For the samples 1, 2, and 3, the zygosity can be determined based on the alleles contained in each sample. The alleles are variations of a gene and are indicated as TNF1 and TNF2.
If sample 1 contains two copies of TNF1, the individual is homozygous for TNF1. If sample 2 contains one copy each of TNF1 and TNF2, the individual is heterozygous for TNF. If sample 3 contains two copies of TNF2, the individual is homozygous for TNF2.
In summary, the zygosity of a sample is determined by the presence of different or identical copies of a gene. Homozygous individuals have two copies of the same gene variant, while heterozygous individuals have two different gene variants.
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Match each organ with the germ layer from which it is formed.
Answers
The organ with the germ layer is formed Ectoderm, Mesoderm, and Endoderm.
Matching organs with the germ layer from which they are formed:
1. Ectoderm:
Skin (including the epidermis and nervous system): The ectoderm is the outermost germ layer and gives rise to the epidermis, which is the outer layer of the skin. It also gives rise to the nervous system, including the brain, spinal cord, and peripheral nerves. The ectoderm is responsible for the formation of structures such as hair, nails, sweat glands, tooth enamel, the lens of the eye, and the inner ear.
2. Mesoderm:
Bones: The mesoderm is the middle germ layer and gives rise to the skeletal system, including bones and cartilage.Muscles: The mesoderm also forms the muscular system, including smooth, skeletal, and cardiac muscles.Connective tissue: Connective tissues such as tendons, ligaments, and adipose tissue are derived from the mesoderm.Kidneys: The kidneys, along with the urinary system, develop from the mesoderm.Reproductive organs: The reproductive organs, including the gonads, develop from the mesoderm.Blood vessels: The mesoderm forms the cardiovascular system, including blood vessels, the heart, and blood cells.Spleen: The mesoderm also gives rise to the spleen, a part of the immune system.3. Endoderm:
The lining of the digestive tract: The endoderm is the innermost germ layer and gives rise to the epithelial lining of the digestive tract, including the stomach, intestines, and liver.The lining of the respiratory tract: The endoderm also forms the epithelial lining of the respiratory tract, including the lungs.Pancreas: The endoderm gives rise to the pancreas, which plays a key role in digestion and blood sugar regulation.Thyroid gland: The thyroid gland, involved in hormone production and metabolism, develops from the endoderm.Bladder: The lining of the urinary bladder is derived from the endoderm.Tonsils: The endoderm contributes to the development of the tonsils, which are part of the immune system.Thymus: The endoderm also forms the thymus, an organ involved in immune cell maturation.know more about Ectoderm here:
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Why do you want to read research by scientists who used the scientific method?
Answers
Answer:
When conducting research, scientists use the scientific method to collect measurable, empirical evidence in an experiment related to a hypothesis (often in the form of an if/then statement), the results aiming to support or contradict a theory.
How the aging is related with the methylation? The methylation increase or decreased ?
Answers
the scientific name of a plant includes the
a. class and order
b. genus and species
c. class and phylum
d. variety and species
Answers
Please help Students made a claim that living things are made of cells, and non-living things are not. Which or these would be the best method to test their claim?
A. Compare the organelles contained in cells.
B. Observe living things using a hand lens.
C. Use a microscope to look for cells in a variety or things.
D. Observe a whether a variety of specimens move on their own.
Answers
Answer:
B or C so they witness it themselves
Explanation:
Which factors improve soil fertility? Select the three correct answers.
A. Nitrogen
B. Humus
C. Manure
D. Horizons
E. Bedrock
Answers
B.Humus
c.Manure
hope this helps
1. What are microorganisms?
2. State three beneficial effects of microorganism.
3. State the causative agents of the following diseases.
I. Cholera ii. Tuberculosis III. Malaria
4. What is a vector?
5. Name two microorganisms and their location in the body.
Answers
Answer:
(MY-kroh-OR-guh-NIH-zum) An organism that can be seen only through a microscope. Microorganisms include bacteria, protozoa, algae, and fungi. Although viruses are not considered living organisms, they are sometimes classified as microorganisms.For example, each human body hosts 10 microorganisms for every human cell, and these microbes contribute to digestion, produce vitamin K, promote development of the immune system, and detoxify harmful chemicals. And, of course, microbes are essential to making many foods we enjoy, such as bread, cheese, and wine.A bacterium called Vibrio cholerae causes cholera infection. Tuberculosis (TB) is caused by a type of bacterium called Mycobacterium tuberculosis. Malaria is caused by a single-celled parasite of the genus plasmodium. The parasite is transmitted to humans most commonly through mosquito bites.an organism, typically a biting insect or tick, that transmits a pathogen, disease, or parasite from one animal or plant to another.Microbes inhabit just about every part of the human body, living on the skin, in the gut, and up the nose.Explanation:
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Compare types of models. Which model best illustrates the formation of blood cells?
Answers
I'm confident that the production of blood cells can be described using a strong system like the computer models because they are used to depict real-life events.
Merks and his colleagues use computer simulations to examine the development of blood arteries. "We began with a common angiogenesis model. The endothelial cell is the only type of cell in this model. However, tip cells and stalk cells are the two different kinds of endothelial cells. Although experiments have indicated that tip cells are essential for angiogenesis, the specific process is unknown. To vary the behavior of certain of the model's cells, we have given them a new color. The tip cells can be moved so that they are at the leading edge of a fresh blood artery.
As a result of a stalk cell pushing the tip cell toward the front of the vessel, a new side branch develops. The emerging network is impacted by this.
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 The prefix chloro- is derived from the Greek word that means "green." Using this information, explain why the chlorophylls are well named.
Answers
The chlorophylls are well named because they do not absorb green light; instead, they permit it to be reflected or transmitted.
What is the main role of chlorophylls?The name chlorophyll is derived from the Greek word khloros meaning pale green and phyllon meaning leaf. Chlorophyll is the pigmentation present in all plants that allows plants absorb energy transmitted from light.
Photosynthesis uses the energy absorbed from light to convert carbon dioxide and water molecules into glucose. As a primary pigment (photoreceptor), chlorophyll reflects green light while absorbing red and blue light in the chloroplast.
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The_ theory explains how our universe became so structured and uniform.
Answers
Answer:
The cosmological principle makes assumptions that provide scientific guidelines to enable its study. Mr. Biggins believes that the universe has been and always will look and be structured the same throughout all time.
Explanation:
The cosmological principle makes assumptions that provide scientific guidelines to enable its study. Mr. Biggins believes that the universe has been and always will look and be structured the same throughout all time.
E1 Biol 2281 usage of internet to analyze nuclei acid
Are these right?
Answers
We can see here that going through the answers provided in the image, we can deduce that they are correct though it will be proper to cross-check before submitting.
What is nuclei acid?Nucleic acids are biomolecules that play a crucial role in storing, transmitting, and expressing genetic information in living organisms. They are essential for the functioning and inheritance of genetic traits.
Both DNA and RNA are polymers made up of repeating units called nucleotides. Each nucleotide consists of three components: a sugar molecule (deoxyribose in DNA and ribose in RNA), a phosphate group, and a nitrogenous base.
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When jaw become large enough to hold the permanent teeth . The milk teeth fall and permanent teeth appear
Answers
The "exfoliation" or "shedding" of milk teeth is the name of the procedure.
What is the Dentition of Humans?The primary and permanent tooth sets make up the human dentition. Maxillary (upper) and Mandibular (lower) are the two opposing arches in which teeth are arranged. These can be split into their left and right halves along the midline (mid-sagittal plane).
Four Different Teeth Types and Their Purposes
The majority of individuals have 32 permanent adult teeth, which can be classified into four groups:
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In what stage of melosis is crossing over most likely to occur
Prophase I
Anaphase II
Metaphase I
Prophase II
Answers
Answer:
the answer to your question is prophase 1 the top answer
Explanation:
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in prophase 1 tetrads of homologous chromosomes form and crossing over occurs add me as a friend and I'll try to help you out with more answers please give me brainiest