General Biology 2: Mechanisms that Produce Change in Population

Subject: Biology 2

Topic: Mechanisms that Produce Change in Population

Difficulty: Hard

Questions: 5

Passing Score: 70%

Question #1 1 point

A population of beetles lives on dark rocks. Some are green and some are brown. Birds easily see and eat the green ones. Over generations, the population becomes entirely brown. Is this because the beetles "tried" to change?

A: Yes, organisms adapt by trying to meet their needs.

B: No, evolution is driven by the survival and reproduction of individuals with existing favorable traits

C: No, this is an example of artificial selection by humans.

D: Yes, the green beetles decided to stop passing on their genes.

Question #2 1 point

A massive wildfire kills 90% of a squirrel population, leaving only a few survivors with a specific rare fur pattern. This pattern becomes common in the next generation. Which mechanism is this?

A: The Founder Effect.

B: The Bottleneck Effect (a type of Genetic Drift).

C: Gene Flow through migration.

D: Selective breeding for industrial application.

Question #3 1 point

In the context of Natural Selection, what does it mean to say that "success is not random"?

A: Mutations are always planned by the organism.

B: Survival is primarily determined by an individual's specific, advantageous traits.

C: Every individual born in a population is guaranteed to survive.

D: Humans choose which animals are allowed to reproduce.

Question #4 1 point

How does "Gene Flow" specifically alter the genetic makeup of a population?

A: By creating new species through the use of restriction enzymes.

B: Through the transport of genes as individuals migrate into or out of a population.

C: By reducing a population size until only one allele remains.

D: By ensuring that only the most complex organisms survive.

Question #5 1 point

Which of the following statements correctly refutes a common misconception about evolution?

A: Evolution is a theory of how life first began on Earth.

B: Evolution always results in organisms becoming more complex and "better."

C: Evolution happens to populations over generations, not to individuals during their lifetime.

D: Evolution provides organisms with exactly what they need to survive any change.

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