Biology Question !

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1

<p>Please help me with answering this question :
Populations 1,2,3,4,5 and 6 each consists of about 10,000 individuals . These populations live in a common environment and they exchange genes (have gene flow) in the following pattern :
Population 1 is isolated and exchange genes with no other population.
Population 2 exchange genes directly with population 3 only.
Population 3 exchange genes directly with population 2 only.
Population 4 exchange genes directly with population 5 and 6.
Population 5 exchange genes directly with population 4 only.
Population 6 exchange genes directly with population 4 only.</p>

<p>If it is assumed that all populations are about the same in number and are similar in initial genetic diversity, which will be most likely to adapt successfully through evolution to a change in the environment.
A) 1 only
B) 1 and 2 only
C) 2 and 3 only
D)3 and 4 only
E)4,5,and 6</p>

2

<p>Which of the following factors that limit population size would be considered density dependent ?
Oil Spill or Disease Outbreak</p>

3

<p>First E)
The second… Oil Spill.</p>

<p>I might be wrong.</p>

4

<p>Thank You !
Another question :
The biome that supplies the largest amount of food for human is :
A)Grassland
B)Tropical Rain Forest</p>

5

<p>Grassland.</p>

6

<p>Thank You :slight_smile:
Another question :
Most of the carbon on the Earth is found in rocks and has little direct effect on photosynthesis because :
A) it circulates in the carbon cycle very slowly
B) carbon containing minerals are completely insoluble</p>

7

<p>Disease outbreak is a density-dependant factor. Oil spill is density independent.</p>

8

<p>A) it circulates in the carbon cycle very slowly
that’s the answer, I think</p>

9

<p>Thanks ALL :slight_smile:
other questions :
The rate of water movement up a tall vascular plant is most dependent on which of the following ?
A)Root Pressure
B)Transpiration pull</p>

<p>2)All of the following contribute to variation in a population except :
A)Mutation
B)Isolation
C)Sexual reproduction
D)Conjugation
E)Genetic drift</p>

<p>3)Changes in which of the following are inherited ?
A) Gene Mutation
B) chromosomal aberration
C)BOTH a and b</p>

<p>4)Which of the following is the most likely explanation for the evolution of golden moles without eyes ?
A)The moles did not need eyes underground and so didn’t develop them
B) a mutation resulting in eyelessness in moles gave rise to a more successful variation of moles
C)the mole’s eyes which were continually irritated by desert sand became infected and degenerated </p>

<p>5) the fittest according to darwin’s theory is
A) the one who can produce the most fertile offspring
B)The strongest individual</p>

<p>Thank you :)</p>

10

<ol>
<li>Transpirational Pull</li>
<li>Isolation</li>
<li>Both a and b</li>
<li>B (I think, I’m not sure)</li>
<li>The one who produces the most fertile offspring </li>
</ol>

<p>:)</p>

11

<p>4 is actually A, I think. Just learned something like this recently in class. Evolution is my strongest biology point…ha</p>

12

<p>3) Only gene mutations are passed on, not chromosomal aberrations. </p>

<p>[Are</a> chromosomal disorders inherited? - Genetics Home Reference](<a href=“MedlinePlus: Genetics”>MedlinePlus: Genetics)</p>

<p>4) B. Individuals don’t develop specific adaptations. A mutation in one individual is already present before the change in environment. Once the change in environment occurs, that specific mutation will be passed on to future generations.</p>