Free Printable Natural Selection

Worksheets

Natural Selection

Total questions: 16

Worksheet time: 7mins

Name

Class

Date

Mass extinctions result in: (check all that apply)

Destruction of all life on earth

Speciation and Biodiversity

Adaptive Radiation

More competition for resources

Why are advantageous traits more likely to be passed onto offspring?

Because they are more likely to survive and reproduce.

Because they come from dominant alleles.

Because they come from recessive alleles.

Because the organism knew it needed that trait, survives, and passes it on.

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

Which is not an example of an adaptation?

A bird's beak allows it to crack open hard nuts.

A zebra's stripes allow it to confuse its predators.

A frog's large hind legs allow it to jump from danger.

A cat sleeps on the sofa to avoid the vacuum cleaner.

The graphs show the changes in crab color at one beach.

Which of the following is most likely to have caused the change in the distribution?

A new predator arrived that preferred dark-tan crabs.

A change in beach color made medium-tan crabs the least visible to predators.

A change in beach color made medium-tan crabs the most visible to predators.

Which of the following is NOT necessary for natural selection to occur?

Variation in traits

Organisms with advantages will survive and reproduce.

A stable, unchanging environment

Traits must be heritable

Tall kelp have a distinct advantage over shorter kelp in receiving needed sunlight in their ocean environment. Which type of natural selection would we expect?

directional selection

disruptive selection

stabilizing selection

artificial selection

According to most scientists, what is the biggest cause of most mass extinctions?

overhunting

evolution of new species to replace old ones

major change in environment/habitat

asteroid impact

What type of natural selection would occur if bacteria that are too large cannot obtain nutrients efficiently and bacteria that are too small cannot compete for those nutrients successfully

directional selection

stabilizing selection

disruptive selection

sexual selection

10.

If finches with large beaks and finches with small beaks increase in a population while finches with average sized beaks decreases, which pattern of natural selection has occurred?

Directional selection

Disruptive selection

Stabilizing selection

11.

A flash flood carried a raft of Amazon ants away from their original population. There is enough distance between the two groups, that they will never meet in nature again. What type of reproductive barrier is this?

behavioral isolation

temporal isolation

gametic isolation

geographic isolation

12.

Some female peacocks prefer males with large, colorful tales while other female peacocks prefer males with no tail at all. Females are beginning to only mate with the type of males with the tail they prefer. What type of reproductive barrier is this?

behavioral isolation

temporal isolation

geographic isolation

13.

A beneficial adaptation, like colorful feathers to attract a mate, can also be harmful because:

Adaptations are mutations and all mutations are harmful

An adaptation cannot be harmful

The bright colors can attract predators

14.

The flowers of pink tulips open in the morning, while the flowers of lavender tulips open in the early afternoon. The bees that pollinate these tulips cannot carry pollen back & forth between the two types of tulips because of their flowers being closed at different times of day. What type of reproductive barrier is this?

behavioral isolation

temporal isolation

mechanical isolation

15.

Evidence suggests humans are currently causing a 6th mass extinction. Which of the following are human impacts on extinction?

Over hunting animals for food or products.

Destroying the natural habitat of species.

Polluting the environments of the world.

All of the above.

16.

True or False: Adaptations that are beneficial in one environment are usually beneficial in all other environments as well.

True

False

Reset

Natural Selection

Total questions: 16

Worksheet time: 7mins

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