Answer the following questions: My answers are as follows.... C, A and D 1. Whic

Question

Answer the following questions:

My answers are as follows.... C, A and D

1. Which statement best describes the relationship between the speed of ecological processes versus evolutionary processes?

a. Evolutionary processes are much slower than ecological processes

b. Ecological processes are much slower than evolutionary processes

c. Biologists use to think that evolutionary processes are much slower than ecological processes, but they now recognize that evolution can happen so fast that ecologists need to understand and be aware of it

d. Biologists used to think that ecological processes are much slower than evolutionary processes, but they now recognize the ecological processes can happen so fast that evolutionary biologist need to understand and be away of them

2. A biologist has measured the tails of all mice in his laboratory population. The distribution of tail lengths is shown at the right, top. The biologist wants the mouse population to evolve shorter tails. Which of the smaller graphs shows the mice he should keep as breeders to produce the next generation?

a. A (Shorter tails)

b. B (Longer tails)

c. C (Intermediate)

d. D (He should keep them all but snip their tails)

3. When heavily armored marine sticklebacks have invaded freshwater lakes where there are no predatory fish, their populations have evolved lighter body armor. Why does this happen?

a. Because young sticklebacks only grow heavy armor when they see predatory fish in their environment

b. Because when individual sticklebacks don't use their armor, it shrinks. They then pass lighter armor to their offspring

c. Because chemicals in polluted water disrupt the growth of armor

d. Because heaily armored fish grow more slowly, remain vulnerable to predatory insect larvae for a longer time, experience higher winter mortality, and breed later

My answers are as follows.... A and C. Answer to question 6 is below.

4. Evolution is:

a. A change in the composition of a population from one generation to the next

b. A phenomenon that must be inferred from evidence, because it cannot be observed directly

c. The transformation of an individal to better fit its environment

d. Driven by the use or disuse of a body part, as when a finch uses its beak to crack open seeds

5. In a famous test of the notion that evolution happens by the inheritance of acquired characteristics, August Weismann maintained a population of mice in his lab for 22 generation. Each generation the measured tail langth, randomly chose individuals to be breeders, snipped of the breeders' tails, and then let breeders mate to produce the next generation. Average tail length did not change from the 1st generation to the 22ed generation. That is, the population failed to evolve. What's the most likely reason the population did not evolve?

a. After Weismann cut off their tails, the breeder mice showered no variation in tail length

b. Even if Weismann hadn't cut off their tails, offspring tail length would not at all resemble parental tail length

c. Tail length (that is, the length of tails mice were born with) had negligible influence on which individuals survived to reproduce

d. Laboratory mice don't need long tails

6. Orcids are a type of flowering plant. How would biologists explain how a living orchid species lacking leaves evolved from an ancestral orchid species that had leaves?

If a living orchid species lacking leaves had evolved from an ancestral orchid species that had leaves, Biologist would use the theory of Natural Selection to try to explain the phenomenon. First, there must have been an advantage to be leafless. For instance, loss of leaves may have promoted or increased an orchid's chance of survival as well as successful reproduction. Maybe leaves were no longer needed and were an energy loss for the orchid to make and maintain. Second, perhaps the environment had changed. The production of leaves could have been a waste because of environment conditions. Maybe leaves was selected against versus for and the survival time of orchid's that had leaves died. And/or increased predation.

Explanation / Answer

Answers with correct options and reasons are given as follows:

1. c

Both these processes are co-dependent and option c describes the relationship accurately

2. a

To obtain mice with short tails, mice who have shorter tails should be selected for breeding.

3. d

Evolution helps an organism or individual to develop traits that are beneficial for it and help in better survival.

4. a

Basically these changes which occur in the gene pool are very minor but they contribute as a whole towards evolution.

5. c

The traits are passed from parents to offspring. If any characteristic is to be passed to offspring it needs to be present in breeding generation as well.

6. Yes, natural selection will be used as the basis by scientists to explain the phenomenon. Good explanation given by you.

Well Done! you have answered the questions correctly.

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