1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mixer [17]
3 years ago
13

In eastern gray squirrels, Sciurus carolinensis, the allele for black fur (B) is dominant to the allele for gray fur (b) . In a

particular population of gray squirrels, 64% have black fur and 36% have gray fur. A researcher calculated the allelic frequencies to be B = 0.6 and b = 0.4. Which of the following could best explain the increase in the frequency of the Ballele in the population after five years?
a. The frequency of the B allele increased because it is the dominant allele.
b. The frequency of the Ballele increased because squirrels with gray fur exhibited greater fitness.
c. The frequency of the B allele increased due to the selective pressures of the environment.
d. The frequency of the Ballele increased because black squirrels randomly mate with other eastern gray squirrels.
Biology
1 answer:
DedPeter [7]3 years ago
7 0

Answer:

The answer to the given question is C.

Explanation:

Natural selection:

The population contains both superior as well as inferior organisms where natural resources are limiting so it will cause competition between organisms. As a result of competition, it will select superiors, and inferiors are deleted and they are given reproductive advantages. Due to this reproductive advantage new population emerges. It is more suitable for the environment.  

Natural selection divides into three parts that are directional, disruptive, and stabilizing selection.  

This is an example of natural selection. Environmental conditions create pressure on the individuals and if they can survive and become fittest, their number increases in the population. This is according to Darwin's theory in the struggle for existence. These organisms survived as the fittest organisms to match climatic conditions.

Stabilizing selection: This operates when features coincide with the optimal environmental conditions and the organisms survive in a population. Stabilizing selection pressures do not promote evolutionary change but tend to maintain stability within the population from generation to generation.  

In the beginning, directional selection - the organism develops characters to survive in response to gradual changes in the environmental conditions. It works on a range of phenotypes existing within a population and exerts selection pressure which moves the mean phenotype to one phenotypic extreme. When the mean phenotype overlaps with the new optimum environmental conditions, stabilizing selection will take over.  

You might be interested in
The bone marrow of the skeletal system produces lymphocytes which belong to what system ​
Fynjy0 [20]

Answer: Immune system

Explanation:

Lymphocytes are a class of white blood cells (leukocytes) involved in immune response when activated by the a foreign molecule (an antigen). B lymphocytes develop in the bone marrow of mammals and are responsible for the production of circulating antibodies.

Thus, lymphocytes are associated with the immune system.

5 0
3 years ago
Read 2 more answers
Which describes the notation of Tt for the trait of being tall
Radda [10]

Answer:

Allel T

Explanation:

7 0
3 years ago
Read 2 more answers
In this lab, the three flocks of birds changed in numbers between generation 1 and generation 3. Why? Check all reasons. The amo
Vlad [161]

Answer:

<u>Option-</u> "If a flock’s beak type made it easier to pick up the available food, the flock grew."                                                                                                                                                                        

Explanation:

  • We can simplify the whole answer by having argument about the structure or alignment of the birds in a given way which provides more food sources or options for the  1st generation and then the third generation can be found in a more scattered form inside the herd, as there are no more food requirement as much was before.
6 0
3 years ago
Read 2 more answers
Where do most of the world's coal mines come from?​
Sonja [21]

Answer:

Most of the world's coal mines come from China, India, the United States, the European Union, and Australia.

Explanation:

  • <u>China: </u>In the year 2018, China alone produced approximately 3523 million tonnes of coal. Though China is the largest producer of coal in the world, it has to import coal from other countries to fulfill its energy needs. China's share in the total coal produced in the world in the last 12 years is 39.7%.
  • <u>India:</u> The production of coal in India reached approximately 716 million tonnes in the year 2018. The total amount of coal produced in India in the last 12 years makes up 7.5% of the coal produced all over the world.
  • <u>The United States: </u>The coal produced in the United States in the year 2018 was approximately 702 million tonnes. The last 12 year share of the coal produced in the US is 16.2% of the total coal produced all over the world.
  • <u>The European Union:</u> The countries that constitute the European Union togetherly produced approximately 490 million tonnes of coal in the year 2018. The last 12-year contribution of the EU to the total coal produced in the world is 9.2%.
  • <u>Australia:</u> The production of coal in Australia for the year 2018 was approximately 481 million tonnes. Australia alone produced 6.2% coal of the total world production of coal in the last 12 years.
6 0
3 years ago
An organism has brown fur, eats nuts and berries, and hibernates in the winter. What biome is this organism likely a part of? Ex
hammer [34]

Answer:

Forest.

Explanation:

Berries and nuts are typically fruits and products of trees, and there must be plentiful amount in which to have a population (though it states only an organism, but it can be assumed). Brown fur is typically <em>camo</em> against a brownish background, which can be reflected essentially through bark & wood of trees.

*Most likely the given organism is a squirrel, which typically prefer forest or habitats with trees or tree-like objects.

~

6 0
3 years ago
Read 2 more answers
Other questions:
  • True or False: Modifier 25 may be reported by hospital and physician (or other qualified healthcare professional) to indicate th
    7·1 answer
  • What blood vessel carry blood away from the heart ? study guide cardiovascular system?
    12·1 answer
  • The remains of living plants or animals are called fossils.<br> True <br> False
    12·2 answers
  • What are t-cells? What role do they play?
    11·1 answer
  • How does pollen typically travel to a female cone?<br><br> birds<br> water<br> wind<br> insects
    13·2 answers
  • why is it important that ions being transported across a cell membrane be shielded from the interior of the lipid bilayer
    13·1 answer
  • Which type of protist is photosynthetic and unicellular with a silica shell?
    11·2 answers
  • Why are scientists concerned about the loss of species as a result of human activities? Why would the extinction of other specie
    12·1 answer
  • Pls help i need help pls
    11·1 answer
  • which sequence accurately describes the path traveled by a new protein from when it first starts to be translated to its release
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!