Answer:
A. Because energy is lost at every level.
Explanation:
energy decreases as it travels from lower levels to upper levels--which is a logical observation you could make.
Think of it like this--if a fish eats a small organism, it will then spend some of the energy obtained from the organism swimming around--so when a larger fish eats our fish, the energy from the original organism will already be partially lost (from our fish swimming around).
This means that when this pattern continues over multiple levels, we keep losing energy--which limits the environment's capacity for organisms to survive.
Hope this helps, have a lovely day :)
By definition, if the DNA of a cell undergoes a spontaneous mutation, is was NOT due to _________. Multiple Choice errors in DNA replication insertion of transposons exposure to radiation spontaneous depurination of nucleotides
By definition, if the DNA of a cell undergoes a spontaneous mutation, is not due to exposure to radiation.
Spontaneous mutations are derived from various sources, which include mistakes made all through the replication of undamaged template DNA, mutagenic nucleotide substrates, and endogenous DNA lesions.
Spontaneous mutation, also referred to as background mutation can be defined as genetic modifications that arise inside the absence of mutagens and haven't any recognized reason.
It is able to result from sports of a normal cellular, including mistakes or errors during DNA replication.
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The diagram shows four possible
genetic arrangements of a cell that
contains two chromosomes during
metaphase.
Part A:
What is the diagram MOST LIKELY
demonstrating?
A. Mutation
B. Crossing over
C. Independent assortment
Independent assortment shows four possible genetic arrangements of a cell that contains two chromosomes during metaphase.
What is independent assortment?According to the Principle of Independent Assortment, as reproductive cells mature, various genes separately segregate from one another. Gregor Mendel made the initial discovery of an independent assortment of genes and the qualities they influence in 1865 while doing genetic research on pea plants.
The image missing in the independent assortment is attached here:
By passing one copy of each diploid pair of homologous chromosomes into each gamete independently of the other pairs, according to the laws of chance, random combinations of chromosomes and genes are formed during meiosis on various pairs of homologous chromosomes.
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answer pls 100 points
Answer:
Hydroxyl: -OH, alcohol
Carboxyl: -COOH, carboxylic acid
Amino: -NH₂, amine
Phosphate: -PO₄, phosphate group*
Carbonyl: -CO, aldehyde or ketone
Sulfhydryl: -SH, thiol
*I have no idea what class of compound this would be. they are normally just referred to as phosphate groups.
**note that all of these groups are attached to a carbon
Answer:
This isn't a hundred points
Explanation:
Modern Native Americans have very high frequencies of Type O blood. In some places in North and South America, the frequency is as high as 100%. Anthropologists believe that early Native Americans arrived in North America by crossing over the Bering Land Bridge around 15,000 years ago, from East Asia. Modern East Asian populations, with whom modern Native Americans share ancestry, do not have high frequencies of Type O blood. Instead, they have some of the lowest frequencies of Type O blood in the world. 1. What forces of evolution are at work? a. Mutation.
b. Natural Selection.
c. Genetic Drift.
d. Gene Flow.
2. Specifically, how is natural selection involved?
3. Explain how the forces of evolution shift allele frequencies in the population over time. Your answer should include all of the ‘forces’ of evolution that you identified as being employed (above). Put this information into a narrative to explain how new traits are introduced, how individuals are selected (if present), and how alleles in the population shift over time.
Option B- Natural selection.
Option D - Gene flow.
1. The forces of evolution at work are:
This can be explained as there is no mutation taking place and only the flow of genes takes place and the alleles are continuous throughout the population irrespective of time.
2. Natural selection takes place as a result of a greater survival rate of individuals having blood groups most suitable for their environment.
3. There are four forces of evolution, they are mutation, gene flow, genetic drift, and natural selection.
A . Mutations are the changes taking place in a gene of the games of individuals so that those traits are passed over to the next offspring/generation produced.
B. Gene flow occurs when the Hardy-Weinberg equation is disturbed, that is when an individual move out or a new individual comes into the population. thus new genes are introduced into the population and the gene pool is disturbed.
C. Genetic drift is the small changes taking place in the gene of individuals in a small population.
D. Natural selection - the ultimate force of evolution that ensures the survival or destruction of a species. the fittest of a population survive while the weaker ones get eliminated.
Modern Native Americans have very high frequencies of Type O blood.
In some places in North and South America, the frequency is as high as 100%. Anthropologists believe that early Native Americans arrived in North America by crossing over the Bering Land Bridge around 15,000 years ago, from East Asia.
Modern East Asian populations, with whom modern Native Americans share ancestry, do not have high frequencies of Type O blood. Instead, they have some of the lowest frequencies of Type O blood in the world.
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68. potential
69. biodegradable
70. primary standards
71. inversion
72. criteria pollutant
73. pesticides
74. kinetic
A. energy in action
B. common pollutants regulated by EPA
C. chemical that kills unwanted animals; generally insects
D. protect health
E. warm air is trapped near the ground by cooler air
AB. stored energy
AC. capable of being broken down naturally
The matching given the accurate description of the terms is given below:
Energy in action ---> Kinetic energycommon pollutants regulated by EPA ----> criteria pollutantchemical that kills unwanted animals; generally insects ---> pesticidesprotect health --> primary standardswarm air is trapped near the ground by cooler air ---> inversionstored energy ---> potential energycapable of being broken down naturally ----> biodegradableWhat is the correct matching of the given terms?The given terms are to be matched to the correct descriptions.
The correct matches are given below:
Energy in action ---> Kinetic energycommon pollutants regulated by EPA ----> criteria pollutantchemical that kills unwanted animals; generally insects ---> pesticidesprotect health --> primary standardswarm air is trapped near the ground by cooler air ---> temperature inversionstored energy ---> potential energycapable of being broken down naturally ----> biodegradableIn conclusion, the correct matches gives the accurate description of the given terms.
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On island X, he saw both species of finches. On island Y, he only saw the finch on the right. Based on these observations, what is the most likely conclusion Darwin would have made?
Darwin's most likely conclusion would have been that different types of finches had beaks of different sizes and shapes, adapted to different types of food in the different ecological niches they occupied on the Galapagos Islands.
Why did Darwin use finches to explain the theory of evolution?Because they have a greater chance of surviving and therefore reproducing, their particular genetic characteristics tend to be passed on to subsequent generations.
With this information, we can conclude that the Galápagos finches are probably one of the most well-known examples of evolution and will forever be tightly linked to Charles Darwin's
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Answer:
answer
Explanation:
it would make sense to have both birds on one island that contains a variety of food but on island y they would only have big beaks which means the bird has to eat nuts and big food
what is the purpose of genetic screening
Answer:
Genetic testing plays a vital role in determining the risk of developing certain diseases as well as screening and sometimes medical treatment. Different types of genetic testing are done for different reasons: Diagnostic testing.
(read that and you will find your answer)
A food web. fox consumes shrew, mouse, and rabbit. shrew consumes grasshopper. mouse consumes grasshopper and grass. grasshopper consumes grass. rabbit consumes grass. snake consumes mouse. what would happen to the population of mice if grasses were lost to a forest fire? it would increase because there would be new plant growth. it would decrease because grass is the mice’s main source of food. it would not change because the mice have several other sources of food.
Answer:
they would decrease
Explanation:
as grasshoppers (there food source) would die out through lack of grass. so without there food source the pop. of mice would decrease
Answer:
It would decrease because grass is the mice’s main source of food.
Explanation:
What evidence was discovered by British researchers in the 1960's to support Wegener's theory of Continental Drift?
A. The spinning of the liquid metal outer core of Earth.
B. Semi-liquid iron and silicon in the mantle layer.
C. Mid-ocean ridges with symmetrical magnetic variations that indicates seafloor spreading.
D. Seismic waves measured on the Richter scale.
The Mid-ocean ridges with symmetrical magnetic variations that indicate seafloor spreading supports Wegener's theory of Continental Drift (Option C).
What is seafloor spreading?The seafloor spreading is a geological phenomenon when tectonic plates separate at divergent boundaries in the ocean.
This natural phenomenon (seafloor spreading) was used as evidence of Wegener's theory of Continental Drift.
In conclusion, the Mid-ocean ridges with symmetrical magnetic variations that indicate seafloor spreading supports Wegener's theory of Continental Drift.
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A/An ____________________ is a radiographic study of the kidneys and ureters with the use of an intravenous contrast medium.
A Intravenous pyelogram is a radiographic study of the kidneys and ureters with the use of an intravenous contrast medium.
What is radiographic study?By taking pictures of the body's internal structure and analyzing them for signs of disease, foreign objects, structural damage, or anomalies, it can be used to diagnose or treat patients. A radiographic procedure involves passing an x-ray beam through the body.
What is intravenous contrast medium?One kind of contrast media is intravenous contrast material, sometimes known as IV contrast in CT. These are a sizable set of chemical preparations created to help characterize pathology by enhancing an imaging modality's capacity to distinguish between various biological tissues.
What is the purpose of a radiology test?Diagnostic imaging, or radiology, is the term for a group of procedures that include taking photos or images of various bodily parts.
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Prozac blocks this process of taking serotonin back into the releasing neuron:
action potential
O reuptake
Oreception
O neurotransmission
What impacts might you expect on your lifestyle once our society arrives at peak oil? What steps do you think we should take to avoid energy shortages in a post-peak -oil future?
Peak oil affects the lifestyle of organisms to a major extent. It is directly to the overproduction of higher levels of toxic compounds when ingested by organisms through air leads to problems like respiratory damage, cancer risk, liver damage, reproductive threat, etc.
What is Peak oil?Peak oil may be defined as the speculative point in time when the global production of oil acquires its maximum rate.
The steps that should be taken to avoid energy shortages in a post-peak -oil future are as follows:
Increase the dependency on solar energy.Limit the use of non-renewable sources of energy.Save major aspects of energy for the future.Conserve and plant more trees.Individuals need to make good habits of the utilization of energy-saving components and appliances that consume very less energy.Therefore, it is well described above.
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In some eukaryotic cells, cilia and flagella are motile cellular appendages that aid the cell in __________.
If the synthesis of antiviral proteins begins after exposure of the host cell to interferons, what kind of genes are the antiviral protein genes likely to be
Answer:
The kind of antiviral proteins genes that are like to be are the induced ones.
Explanation:
An inducible gene is a gene that is expressed in the presence of a substance (an inducer) in the environment. This substance can control the expression of one or more genes (structural genes) involved in the metabolism of that substance.
When the cell is being exposed to interferon then only it starts synthesizing or producing antiviral protein. It means that the gene (antiviral protein synthesizing ) is induciblle. In other words the gene will start only expression (induced) when it will detect some signal (interferon). So, if there will be no signal (interferon) then the gene will not express. Inducible genes respond to environmental signals of to different growth stages.
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Who is and who is not recommended to receive a flu vaccine? Why do these recommendations exist?
Why is it important for the CDC to update its flu vaccination recommendations each year?
A yearly flu shot is advised for everyone aged 6 months and older, with rare exceptions. People who are more likely to experience serious flu complications should receive vaccinations.
The following individuals should not receive a flu shot:
It is not recommended for infants under 6 months to receive a flu vaccine.People with severe, life-threatening sensitivities to any component (other than egg proteins) of the flu vaccine shouldn't receive it. Gelatin, antibiotics, and other substances might be included in this. The influenza vaccination should not be administered to anyone who has experienced a severe allergic reaction to it again, and they may also be ineligible to get subsequent doses of the vaccine. The flu vaccines may be modified from one season to the next to protect against the viruses that are anticipated to circulate more during the upcoming flu season due to the fact that flu viruses are continually evolving.Thus, it is necessary for the CDC to update its flu vaccination recommendations.
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How would you expect the rate of meat digestion to differ in an animal whose digestive tract had less of the enzyme pepsin?
Answer:
Digestion occurs when the animal’s body gets busy breaking down the food. Two types of digestion exist in all animals: Mechanical digestion physically breaks down food into smaller and smaller pieces.
Complete the sentence: Due to _________, some people need to limit their exposure to pollen because it aggravates their respiratory systems.
Some people must restrict their pollen interaction owing to hereditary causes since it irritates their respiratory mechanism.
What is Pollen allergy?Pollen is amongst the most prevalent periodic allergy triggers. Pollen allergy is commonly referred to as "hay fever" by several individuals. Pollen allergy is commonly referred to as "seasonal allergic rhinitis" by specialists.AllergyAllergy symptoms can affect the lungs by causing asthma, allergic bronchitis, as well as other lung issues. Pollen is produced by plants throughout the spring, summer, and early fall. Pollen inhalation might induce allergic responses that harm the lungs.Learn more about universal donors here:
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Represents a single pathway through which energy and matter flow _____ 2. feeding positions in a food chain or web _____ 3. the living aspects of the environment _____ 4. the role of a species in its ecosystem _____ 5. consumes the soft tissues of dead animals _____ 6. the physical environment in which a species lives _____ 7. represents multiple pathways through which energy and matter flow _____ 8. states that two different species cannot occupy the same niche in the same place for very long _____ 9. the nonliving aspects of the environment _____ 10. the study of how living things interact wit
for why neiterkob is called the beginner of the earth
Answer:
Explanation:
Now, the rest of the tribe calls my father the "Beginner of the Earth" because he mediates between Enkai and our tribe, just as he did when the cattle returned from the sky.
What would the concentration of albumin be if the total protein value was 8.5 g/dL and the densitometer measured the albumin fraction as 55% of the total
Concentration of albumin = 4.675
How to calculate the concentration of albumin?
Multiple the amount of albumin in each of our tubes by 1,000 ug/mg to get the number of micrograms present. 0.1 mg/ml multiplied by 1000 ug/mg results in 100 ug/ml (the mg cancel out).
Given:
Total protein value = 8.5 g/dL
The densitometer measured the albumin fraction = 55%
Concentration of albumin =?
Formula:
Concentration of albumin = Total protein value x The densitometer measured the albumin fraction
Explanation:
Concentration of albumin = 8.5 g/dL * 55/100
= 8.5 x 0.55
= 4.675
So, The concentration of albumin is 4.675.
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11 A housewife noticed that cucumber slices become soft when immersed in salt solution. Which process causes the softening of the cucumber slices?
A Water diffuses into the cucumber slices by osmosis
B Water diffuses out from the cucumber slices by osmosis
C Salt moves into the cucumber slices by active transport
D Salt moves out from the cucumber slices by active transport
Answer:
A
Explanation:
Water flows from area of low solute concentration (aka hypotonic solution) to an area of high solute concentration (aka hypertonic solution).
The graph predicts the effect that each factor would have on the biodiversity of the Mediterranean Sea in the next 10 years. However, if the government introduces laws prohibiting hunting, it would somewhat reduce the impact _______ would have on the biodiversity. Similarly, if laws prohibiting introduction of new plant or animal species within the country are passed, it will curb the effect ________ would have on the sea’s biodiversity.
The graph predicts the effect that each factor would have on the biodiversity of the mediterranean sea in the next 10 years. however, if the government introduces laws prohibiting hunting, it would somewhat reduce the impact (eutrophication, exploitation, pollution) would have on the biodiversity. similarly, if laws prohibiting introduction of new plant or animal species within the country are passed, it will curb the effect (exploitation, climate change, invasive species)would have on the seas biodiversity.
What is eutrophication?In an aged aquatic habitat like a lake, eutrophication is the progressive rise in the concentration of phosphorus, nitrogen, and other plant nutrients.
Because hunting is primarily done for amusement or to obtain treasures from animals such skin, horn, ivory, and venome for selling on the global market and reaping enormous profits from them, hunting would have a somewhat smaller influence on biodiversity if the government passed laws outlawing it. The introduction of a hunting ban will lessen the killing and use of animals as commodities.
The impact that invasive species would have on the waters would be reduced if regulations limiting the entrance of new plant or animal species within the nation were implemented. Living things that invade or migrate to new areas in quest of resources are known as invasive species. Native species suffer due to competition from these species, which causes a fall in native species. As a result of the fall in native marine species and potential extinction of native species, this will affect the actual biodiversity of the ocean.
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Answer: exploitation, invasive species
Explanation:
Francesco redi took twelve jars and placed meat in all of the jars. he left four open, four covered with gauze and four were completely sealed. maggots developed in the open jars but did not develop in the other eight jars. experimental design francesco redi disproved i , the belief that living cells can arise from non-living material. unfortunately, this experiment did not change the scientific minds of his day. in 1859, ii finally disproved this theory with his experiment involving s-shaped flasks.
The theory that Francesco redi sought to disprove by his experiments was the theory of spontaneous generation.
What is the theory of spontaneous generation?The theory of spontaneous generation is the theory that living-things can arise spontaneously from non-living things.
Early scientists believed this theory. The experiments by Francesco Redi sought to disprove this theory.
However, it was only the experiment by Louis Pasteur that finally helped scientists at the time to reject the theory of spontaneous generation.
In conclusion, the experiments by Franceso redi was aimed at disproving the theory of spontaneous generation.
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The following diagram shows the branching tree for four kingdoms and some of their shared derived characteristics.
(Common Cell)
Protists
Plants
Fungi
Animals
What shared characteristic can be written at point X? Use complete sentences to explain your answer.
Nuclear membrane, cytoplasm, organelles and cell membrane are present at point X.
What shared characteristic can be written at point X?The shared characteristic can be written at point X are presence of nuclear membrane, cytoplasm, organelles and cell membrane because these substances or materials are present in every cell.
So we can conclude that nuclear membrane, cytoplasm, organelles and cell membrane are present at point X.
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how does nephron help in regulating fluid and electrolyte balance
condition wherein the sperm of the male is weak, malformed, or is unable to join an egg cell is known as
The condition wherein the sperm of the male is weak, malformed, or is unable to join an egg cell is known as Asthenezoospermia.
What is Asthenoteratozoospermia?Asthenozoospermia or asthenospermia is the male condition that refers to sperm motility. In this sense, it is the situation in which the male reproductive cells do not have enough motility to reach the egg in the female body.
In this case, is called Asthenezoospermia the condition wherein the sperm of the male is weak, malformed, or is unable to join an egg cell.
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How could we make a pegasus anatomically possible?
A pegasus can be anatomically possible through the addition of features such as wings to a horse.
What is Anatomy?This is referred ti a branch of science which studies the body structures of organisms in the environment.
A pegasus is a winged horse which is why the addition of wings will make it anatomically possible.
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Which of the following events happens after translocation?
A. A region of a chromosome breaks off and rejoins either the other end of the same chromosome or another non-homologous chromosome.
B. A region of a nucleotide rejoins and breaks off in different chromosomes in a non-homologous pair.
C. A region of a nucleotide rejoins and breaks off in different chromosomes in a homologous pair.
D. A region of a chromosome breaks off and rejoins in different chromosomes in a homologous pair.
Answer:
A. A region of chromosome breaks of And joins either end of same chromosome or another of non homologus chromosome.
In skunks, stripes (S) is dominant to spots (s) and black coat color (B) is dominant to brown coat color (b). If a skunk that is homozygous for stripes and heterozygous for black coat color is crossed to a skunk that is homozygous for spots and heterozygous for black coat color, what genotypic and phenotypic ratios would you expect to observe among the offspring
The genotypic and phenotypic ratios observed among the skunks offspring are:
Genotypic ratio: 1 : 2 : 1 : 2 : 4 : 2 : 1 : 2 : 1
Phenotypic ratio:
Striped Black coat = 9/16
Striped Brown coat = 3/16
Spotted Black coat= 3/16
Spotted Brown coat = 1/16
A cross is made between a striped black coat (SSBB) with spot brown coat (ssbb). Stripes (S) is dominant to spots (s) and black coat color (B) is dominant to brown coat color (b).
In F1 generation its shows a progeny of SsBb.
If shunks of contrasting characteristics like stipe/spot and black coat/brown coat are crossed the F1 progeny would have all Stripped with black coat according to the dominance. This implies that stripes is dominant over spots and black coat is dominant over brown coat . In F2 progeny, there would be some stripes with black coat and spots with brown coat. However, there would be some shunks with recombination of characters such as stripes with brown coats and spotted shunks with a black coats. This depicts that stripe/spot and black/brown coats traits are inherited independently of each other following law of independent assortment. which states that when two traits are taken in a cross the segregation of one trait is independent to the segregation of other characters.
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Which represents a strand of RNA bases?
The sequences that represent strands of RNA bases are those containing Uracil.
What is RNA?Ribonucleic acid (RNA) is a nucleic acid molecule composed of only one strand and it is the product of the transcription of DNA.
The nucleotide RNA nitrogen bases include Adenine, Guanine, Cytosine and Uracil (instead of Thymine as observed in DNA).
In conclusion, the sequences that represent strands of RNA bases are those containing Uracil.
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Answer: CAAGG U C U C or the third choice
Explanation: In an RNA strand, the bases would be Thymine, Uracil, Guanine and Cytosine