Free Printable Mechanisms of Evolution

Worksheets

Mechanisms of Evolution

Total questions: 20

Worksheet time: 19mins

Name

Class

Date

Which best describes an adaptation?

A trait that helps an organism to survive in its environment.

A trait that the organism can change when he wants.

A trait that does not help the organism to survive in its environment.

The place where an organism lives.

What does the term variation mean?

The same traits in a population.

The different ways that traits are expressed in a population.

The same ways traits are expressed in a population.

The place where an animal lives.

Which of the following variations would help members of a rabbit population survive if the climate turned very hot?

Thinner fur

Ability to run faster

Ability to jump higher

Ability to eat more

Variations are differences between individuals in a population.

True

False

Mutations are a source of variations.

True

False

Mutations are always harmful to an organism's survival.

True

False

Over time natural selection can change how often a trait is seen within a population.

True

False

1. The process of choosing parent organisms for desired characteristics is called

natural selection

Artificial selection

random selection

genetic manipulation

What is an example of artificial selection?

Letting dogs choose their own mate

Letting plants pollinate on their own

Crossing a labrador and a poodle to create a labradoodle

10.

Which statement is true comparing natural selection and artificial selection?

In natural selection, traits benefit humans and in artificial selection, the traits benefit the species

In natural selection, traits benefit the species and in artificial selection, the traits benefit humans

In natural and artificial selection, the process takes hundreds of years to occur

In natural and artificial selection, nature determines what traits will be passed down to offspring.

11.

When humans select desirable traits to be passed down to offspring

natural selection

artificial selection

12.

In natural selection, the selective agent is the

humans

mutations

breeders

environment

13.

Mutations are important because they bring about

death of the organism in which they develop

genetic variation needed for a population to evolve

benefits for the individual, not for the population

Hardey-Weinberg equilibrium within a population

14.

A rabbit that can easily outcompete other rabbits for food and that can produce many offspring has a high

sexuality

mutation rate

fitness

adaptability

15.

What does sexual selection mean?

Mating is not random

Organisms mate based on attractiveness

Organisms have the ability to compete for a mate

All of these are true

16.

Organisms pass down their DNA to their offspring

True

False

17.

Adaptations can be:

camouflage

ability to survive cold weather

hunting skills

all of the above

18.

Why is the mouse population changing over time?

The light mice can reproduce more successfully than the dark mice

The hawks eat more dark mice than light mice because the dark mice taste better

The hawks eat more light mice than dark mice because they can see the light mice more easily

The hawks eat more dark mice than light mice because they can see the dark mice more easily

19.

Yellow toucan birds seek out one another to make babies together and tend to avoid the green toucan birds.

Genetic Drift

Sexual Selection

Artificial Selection

Mutation

20.

Bats are common in Texas, especially in rocky regions. Bats with longer hang claws have demonstrated higher fitness because of their ability to cling to rock while resting. This adaptation is becoming more frequent in the population. What mechanism of evolution is this?

Natural Selection

Artificial Selection

Sexual Selection

Genetic Drift

100 %

Mechanisms of Evolution

Total questions: 20

Worksheet time: 19mins

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