Evolution Test

Behavioral changes of individuals of a species that allow for better survival is called....

(a)  

• Adaptation
• Variation
• Behavior
• Environment

A dam is built and a population of fish is separated into 2 different populations. The dam prevents migration between the 2 newly formed populations of fish. (a)  

• behavioral reproductive isolation
• temporal isolation
• hybridization
• geographical isolation

The theory of evolution by natural selection means that what is changing over time?

• The acquired traits of a population.

• The inherited traits of a population.

• Hair color and eye color

• Attractive features.

Genes for traits that help an organism be more successful reproductively can be expected to​ ​ (a)  

• become more common in the future.
• cause it to evolve into a new species.
• cause the extinction of the species.
• eventually be eliminated by natural selection.

Which of the following is NOT a principle of natural selection?

• Most species produce more offspring than will actually reproduce.

• Organisms compete for limited resources.

• Evolution will occur as an organism gets older and learns more.

• In every population, adaptations allows some organisms to survive and reproduce better than others.

Which of the following MOST accurately describes how natural selection impacts evolution?

• Natural selection will eventually produce the optimal trait(s) for a given environment.

• Natural selection will select the best versions of a trait for a given environment from among those available.

• Natural selection will produce a variety of traits, some but not all of which are beneficial in a given environment.

• Natural selection will select traits at random from the available variants.

What is genetic drift? ​

• differences between individuals or differences between populations

• the introduction of unrelated individuals into a breeding group

• a process by which organisms change over time

• random fluctuations in the frequencies of alleles from generation to generation due to chance events

Which evolutionary process explains why polar bears are white to camouflage themselves against a snowy background?

Select ALL that apply.

• Mutations

• Genetic Drift

• Natural Selection

• Migration

 A population of bacteria is treated with hand sanitizer. Because of genetic variation in the population, what is a possible outcome?

• The population will grow quickly.

• They will get better at obtaining a food source.

• Some may be resistant and survive.

• All of the bacteria are already resistant.

In a population of birds, males grow long, red tail feathers that they use to attract females. Feather length varies between males.

The males with the shortest tail feathers have a hard time attracting mates therefor have fewer offspring. The males with the longest tail feathers are slowed down because of the extra weight and more likely to be eaten by predators. Males with medium length tail feathers have the most offspring

If this trend continues and the birds environment does not change, what would you expect the tails of the males to look like in the future?

• Most males will have long tails.

• There will be two distinct variants of tail feather length, with some males having long tails and others having short tails.

• There will be less variation in tail feather length, with most males' tails close to what was intermediate length.

• Most males will have short tails.