Exam 16: How Populations Evolve

A new predator is introduced to an area that can feed on any millipedes shorter than 200 millimeters. No millipedes that live in that area are longer than 15 millimeters. What will happen?

Which of the following can affect a small, endangered population so severely that it goes extinct?

The gene pool for a particular population is made up of

The fish in a certain population average 10 millimeters in length. Imagine that a population of predatory birds arrives in the area, but they cannot eat fish longer than 15 millimeters. After a decade, if the fish average 14 millimeters in length, what probably happened?

What conditions are necessary for a population to be at equilibrium?

In a certain species of salmon, some adult males are extremely large whereas other adult males are very small, compared to the females. There are no intermediate-sized adult males in the population. This is probably the result of

When different species closely interact for an extended period of time and develop new adaptations in response to each other, it is called

Which of the following can evolve?

Which trait is the best example of an adaptation?

A population with__________ is at risk for extinction.

In a population, the most common phenotype represents the dominant allele.

Suppose that the only remaining population of a certain reptile species lives on an African mountain and that there is no migration out of this large but isolated population. Which of the following describes the most likely future of this reptile population?

Organisms that have the greatest reproductive success are considered the most evolutionarily fit.

Imagine that one of the original four mice that escape from a research lab is blind due to a genetic defect. If the escaped mouse breeds and most of the mice born in subsequent generations are blind from birth, this is most likely a case of

Gene flow

Evolution occurs in_______ .

Genetic drift is more common in large populations than in small populations.

Which of the following occurs due to chance events that change the allele frequencies in small populations?

When one species evolves a new phenotypic feature and another species evolves new adaptations in response, it is called

In the context of evolution, equilibrium means