Answer:
Genetic drift Natural
Explanation:
In evolution, which driving factor most consistently requires a small population as a precondition for its occurrence? Genetic drift Natural In evolution, which driving factor most consistently requires a small population as a precondition for its occurrence? Genetic drift Natural selection Nonrandom mating Mutation.
In evolution, Genetic drift is the driving factor which most consistently requires a small population as a precondition for its occurrence.
What is Genetic Drift?A change in the relative frequency of alleles within a population is an example of genetic drift. Natural selection, often known as the differential survival and reproduction of individuals across a population as a result of differences in phenotype, is one of the possible causes of this phenomenon.
Natural selection gives an advantage to some characteristics in a population, which results in certain individuals being able to reproduce while others, who have characteristics that give them a disadvantage, will provide their genes to subsequent generations. This will ensure that the allelic frequency of each successive generation will be distinct from that of the parent group.
Therefore, a subpopulation may become genetically diverse from its parent population due to genetic drift.
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Imagine that someone from another planet is visiting Earth. They see aeroplanes and birds
moving through the sky,
Explain to the visitor why birds are alive and aeroplanes are not alive, even though they seem to
share some of the characteristics of living things
Birds, like airplanes, must be lightweight as well as powerful. They can fly only because evolution slimmed down their entire anatomy from their reptilian ancestors. Over time, the bones of birds have become lighter and, in the case of many "finger bones," some have disappeared altogether.
Use the four population pyramids above to answer the question. Which country's population is
significantly decreasing? Sb
O Brazil
O Japan
O Afghanistan
O US
Select the correct answer.
What pollutant does this image convey?
A.
methane
B.
black carbon
C.
HFCs
D.
a persistent organic pollutant
E.
tropospheric ozone
Answer:
A persistent organic pollutant
Explanation:
POPs (Persistent organic pollutants) is what how we name the organic compounds that are resistant to the environmental degradation through biological, chemical, and photolytic processes. Some organic pesticides are the most widespread Persistent organic pollutants used in agriculture worldwide.
Please help. This in an crossword puzzle.
Leaves falling from a tree ,what is explanation
Explanation
~ Cliché as it may sound, leaves falling from a tree is caused by the gravity of the Earth.
GRAVITY~ Gravity is one of the reason and the driving force that made the universe possible. It is the entity that enables the sun to hold planets together in the solar system; the reason why Earth is revolving around the sun just like the moon orbiting the Earth.
~ Gravity has to do with everything on Earth -- leaf falling from the tree, ball bouncing up and down, ocean waves, and stalactites facing downwards.
Picture showing the gravitational relationship of Moon and Earth.
Consider three independently assorting gene pairs, A/a, B/b, and C/c, where each demonstrates a typical dominance (A-, B-, C-) and recessiveness (aa, bb, cc) relationship. What is the probability of obtaining an offspring that is triply dominant from parents that are AaBbcc and AaBbCc
Assuming complete dominance and following the product probability rule, the probability of obtaining an offspring that is triply dominant AABBCC is 1/32.
What is complete dominance?
We talk about complete dominance when the dominant allele completely masks the recessive allele. It is an inheritance pattern.
This is the case of individuals that are heter0zyg0us for a particular gene and express the dominant phenotype. The dominant allele is hiding the expression of the recessive allele.
Many genes show complete dominance.
In the exposed example, we need to cross AaBbcc x AaBbCc and calculate the probability of getting offspring that is triply dominant. To do it, we will follow the product probability rule.
What is the product probability rule?The product probability rule allows us to calculate the probability of occurrence of event A and event B at the same time.
It is about a joint probability of two or more events that might happen simultaneously, not excluding each other.
This rule is based on the dependence or independence of the events. If two events A and B are independent of each other, the occurrence of one of them does not affect the occurrence of the other one.
For independent events, the rule establishes that, given two different events A and B, the probability of occurrence of both together is
P(A∩B) = P(A) x P(B)
Since these are independent genes, for easier calculations, we can perform crosses that involve each of the genes separately -events-, and then multiply de results according to the genotype we are interested in (AABBCC).
Gene A
Parentals) Aa x Aa
Gametes) A a A a
Punnett square) A a
A AA Aa
a Aa aa
F1) 1/4 AA
1/2 Aa
1/4 aa
Gene B
Parentals) Bb x Bb
Gametes) B b B b
Punnett square) B b
B BB Bb
b Bb bb
F1) 1/4 BB
1/2 Bb
1/4 bb
Gene C
Parentals) cc x Cc
Gametes) c c C c
Punnett square) C c
c Cc cc
c Cc cc
F1) 1/2 Cc
1/2 cc
The probability of getting and individual with genotype AABBCC is
P(AABBCC) = P(AA) x P(BB) x P(CC)
P(AABBCC) = 1/4 x 1/4 x 1/2
P(AABBCC) = 1/4 x 1/4 x 1/2
P(AABBCC) = 1/32
The probability of obtaining an offspring that is triply dominant AABBCC is 1/32.
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What are the primary distinguishing characteristics between Prokaryotic cells and Eukaryotic
cells? Why is this difference important to note?
Which of the following terms denotes the chromosomes which are similar in size, shape, and genetic material?
Answer: Each pair of chromosomes consists of two chromosomes that are similar in size and shape. They contain the same genes at the same loci, though they may have different alleles. These pairs of chromosomes are known as homologous chromosomes or homologs.
Explanation:
What happens in the netlike structure labeled B in the diagram?
(A) Carbon dioxide and oxygen diffuse into the blood
(B) Nitrogen and oxygen are exchanged,
(C) Carbon dioxide and oxygen are exchanged,
(D) Nitrogen and carbon dioxide remain constant,
NO LINKS AND NO FAKE ANSWERS. Rather than push a heavy box from one room to another, a worker chooses to place the box on a wheeled cart. In terms of friction, explain why moving the box on the wheeled cart is easier than pushing.
Answer:
The reason why that pushing something on a cart is easier than pushing it around without a cart is very simple actually. Pushing something on a cart is much easier because there is a much smaller act of friction. This results in a smaller strain on the body.
Explanation:
There isn't really a need for an explanation because it's that simple. I don't blame you for not knowing it though. People don't know everything.
Should the amendment , which allows for free speech , include all types of speech ? What about bad language racial slurs , and other words that hurt other people's feelings?
Explanation:
No because a speech has to be a meaningful speech
Summarize the weather and ecological conditions associated with each season?
Answer: Seasons have an enormous influence on vegetation and plant growth. Winter typically has cold weather, little daylight, and limited plant growth. In spring, plants sprout, tree leaves unfurl, and flowers blossom. Summer is the warmest time of the year and has the most daylight, so plants grow quickly. In autumn, temperatures drop, and many trees lose their leaves.
Explanation:
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The black-footed ferret lives on the grasslands of North America. The species is endangered because of habitat loss and disease. What change would cause the species to become extinct?
A. Habitat loss continues to such an extent that the carrying capacity for black-footed ferrets becomes zero.
B. Disease continues to kill a constant percentage of all black-footed ferrets during the first year of life.
C. The black-footed ferret population decreases until the birthrate equals the death rate.
D. The black-footed ferret population decreases low enough for other limiting factors to affect it.
Answer: A is the answer
RNA is made because DNA is always in the nucleus,but ribosomes for making proteins are found in the _______
Answer:
Cytoplasm
Explanation:
In eukaryotes, there is a definite nucleus where the ribosome and mRNA production takes place. The ribosomes and mRNA come out of the nucleus into the cytoplasm where the ribosomes work upon and catalyze the formation of proteins. Meaning that in eukaryotic cell, ribosomes make proteins in the cytoplasm.
Explanation:
Ribosome existed in the rough endoplasmic reticulum and existed freely in cytoplasm
A forest fire left many acres of dead trees and burned ground. Which of these is the first type of organism that will be found living in the center of the burned area? uirrels Grasses Cottontail rabbits Coyote ()
After an episode of forest fire, the first type of organism likely to be found living in the center of the burned area would be grasses.
What is succession?It is the gradual change to the community of plants and animals in an ecosystem until a stable community is reached.
Succession can be primary or secondary. Primary succession happens on newly colonized bare grounds of stones while secondary succession happens in an existing community after a period of disturbance such as wildfire.
A forest ravaged by fire will have all the animals dead or away for safety reasons. These animals may not come back until regrowth has reached a certain level.
However, propagules of grasses are often fire-resistant and even get stimulated by fire in most cases. Thus, the first type of organism to be found living in the burned area could be grasses.
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Media convergence is the result of the integration of the different media technologies. please select the best answer from the choices provided t f
Media coverage is used for different blogs, feeds, video content etc. It is the result of the different media technologies.
What are the types of media coverage?Like other works, media coverage is also require very hard work and risk accepting skills. Media coverage can have 3 types. They are:
Owned coverage: this is the coverage of one's own media.Paid coverage: this type of coverage include promotional events.Earned coverage: it includes unpaid coverage from other source.Thus, the given statement is true.
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Answer: true
Explanation:
Help w this I’ll give brainliest
Answer:
The common things between all species are DNA, RNA, amino acids, and ATP. All living things have the same biochemical building blocks.
It shwos that although we all have similar structures and make-up, who we evolved from counts for who we are. Species come from the same things but differenciate over time due to evolution.
I think that a horse and a donkey would have the fewest differences. I think this because the two species are very similar and amino acids refect the similarities between two species. Both horses and donkeys have a similar structure and make-up, which is determine by amino acid sequences.
Explanation:
How do food chains influence our lives?
Answer:
Food chains influeice our lives by avalibility.
Explanation:
Food chains means there are consumers and producers. There are top and bottom of food chains along with inbetween. The lower on the food chain effects the food avalibility because there will be less animals or plants that were consumed by top level on the food chain.
Dissociative identity disorder is no longer controversial as the production of books and movies has raised a new understanding of the affliction. please select the best answer from the choices provided t f
The statement is False.
As the movies and books only heighten the controversy associated with the disorder.
What is Dissociative identity disorder?
Dissociative identity disorder is a mental illness in which the person is diagnosed with having two or more different personalities with memory gaps or forgetfulness in between these different personality states.
The disorder is a controversial one, and the movies and books focusing on the disorder have failed to reduce this controversy as these books and movies often associate the disorder with violence and crime and ignore other important aspects of the mental problem.
Hence the movies and books only heighten the controversy associated with the disorder.
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Of the four animals (human,cat,whale,bat) which would you argue are the most closely related on the evolutionary tree?Justify your answer
Answer:
I think humans and whales are closely related on the evolutionary tree because they are both mammals and both have endoskeleton
2. Bacteriophages are
a. a form of bacteria.
b. enzymes.
c. coils of DNA.
d. viruses.
Answer: (d) viruses
Explanation:
Bacteriophage is a type of virus that infects bacteria.
Explain why most humans require a supply of glucose.
Answer:
Nerve cells and chemical messengers there need it to help them process information so basically without it your brain wouldn't be able to work well
Explanation:
Most humans require a supply of glucose because Nerve cells and chemical messengers they need it to help them process information. Without it, your brain wouldn't be able to work well.
Why do we need glucose everyday?
Glucose provides energy for physiological processes such as respiration, heart rhythm and the regulation of body temperature.
Why is glucose required in the cell?
Glucose provides quick energy for cells. Fat has more energy than glucose, but it requires some chemical conversions before we can get it into the process of cellular respiration, so it takes longer to use.
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What would NOT be considered routine practice during or after conducting uncomplicated aseptic surgical procedures in nonhuman primates
We can confirm that actions that would not be considered routine after said procedure include all of which are not directed towards the care and recovery of the animal.
What would help the care and recovery of the animal?Routine practices include caring for the animal as it recovers from the effects of the anesthesia as well as administering fluids to keep it hydrated. Even pain control through the use of pharmaceuticals is considered normal practice, anything that would fall outside of these actions may be considered abnormal practice.
Therefore, we can confirm that actions that would not be considered routine after said procedure include all of which are not directed towards the care and recovery of the animal.
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When a group of proteins such as interferons and interleukins are released by the t cells, intercellular signals begin the immune response, what is the medical term used for the group of proteins?.
The cytokine describes the group of proteins such as interferons and interleukins that regulate cell communication, mainly produced by the immune system in normal and pathological conditions.
What is a cytokine?They are messenger molecules with a glycoprotein structure, whose lifetime is short and generally secreted in cascades.
They are produced by different activated cells, responsible for innate and/or acquired immunity, and regulate the immune and inflammatory response.
Therefore, we can conclude that the cytokine describes the group of proteins that regulate cell communication, mainly produced by the immune system in normal and pathological conditions.
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The anterior and posterior lobes of the pituitary differ in that _____.
Answer:
-The posterior pituitary does not secrete its hormones but acts as an extension of the hypothalamus, storing those hormones.
-The anterior pituitary secretes its hormones (predominantly tropic hormones).
Explanation:
Match de word with the correct definition
Explain how scientists foresee the fuel being used?
Answer:When biomass is harvested and processed, scientists can break down and convert the plant cells into renewable fuels or chemicals.
Explanation:
Monohybrid crosses fill in the blanks
Explanation:
1. TT_Ho. Bb_He. DD_Ho. Ff_He. tt_Ho. dd_Ho
TT and DD are purebred
Bb and Ff are hybrids
2.YY_Ho yellow. Yy_He yellow. yy_Ho blue
SS_Ho square. Ss_He square. ss_Ho blue
3.Tall = TT or Tt. short = tt
Pink body = PP or Pp. yellow body = pp
4.
How do you clam and earthworm organs differ
Answer:
The marine clamworm, Nereis, is carnivorous therefore its digestive system differs from that of the herbivorous earthworm, Lumbricus. The mouth and jaws are retractable (Figure 8, 9). If the jaws are retracted, cut along the midline of the pharynx and pull the jaws out with a pair of forceps.
Explanation:
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Blood passes from the right ventricle to the _____ and then the _____ before reaching the lungs to pick up oxygen. Multiple choice question.
Blood passes from the right ventricle to the Pulmonary valve and then the Pulmonary artery before reaching the lungs to pick up oxygen
Blood circulation procedureWhen the blood enters the right ventricle it contracts and sends the blood through the Pulmonary valve before it reaches the Pulmonary artery which is passes the blood to the Lungs where it becomes oxygenated.
Hence we can conclude that Blood passes from the right ventricle to the Pulmonary valve and then the Pulmonary artery before reaching the lungs to pick up oxygen.
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