Free Printable Natural Selection

Worksheets

Natural Selection

Total questions: 17

Worksheet time: 13mins

Name

Class

Date

What word describes a trait that helps an organism survive in its environment?

natural selection

mutation

camouflage

adaptation

All mutations and adaptations usually lead to what process?

selective breeding

behavioral

natural selection

genetic engineering

Why do frogs and other organism reproduce so many eggs or offspring?

so that their babies can have friends to play with

the more offspring the more likely the offspring will survive

the more offspring the less likely offspring will survive

the more offspring the less competition

Which organisms are most likely to survive?

the best adapted

the fastest

the strongest

the most domesticated (tamed)

Which of the following means "genetic change over time"

natural selection

speciation

evolution

fitness

The differences among a species, like different bird beaks, are called

genes.

variations.

traits.

theories.

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 trait is an acquired phenotype.

A group of birds in an area eats many kinds of seeds. A disease kills all the plants in an area except for tall trees that produce hard seeds. Which of these traits will future generations of the birds most likely have?

Webbed feet and strong wings

Strong wings and strong beaks

Strong beaks and webbed feet

Showy feathers and Small beaks

Which feature of a rose helps it grow without being eaten by large animals?

flowers with bright colors

sharp thorns

small seeds

deep roots

10.

Bird's beaks evolve mainly due to the type of ___________________ available.

food

water

shrubs

mates

11.

Organisms with differences/variations that are helpful will ______________________

live longer

become extinct

show no change

12.

Genetic differences between organisms of the same species

Variation

Adaptation

Behavior

Environment

13.

Which layer formed first?

Rock Layer W

Rock Layer X

Rock Layer Y

Rock Layer Z

14.

Reorder the following

Bacterial infection occurs

Antibiotics kill 95% of the infection

Survivors of the antibiotics produce new bacteria

Bacteria have resistance to antibiotics

15.

During natural selection, the organisms with the best adaptations..

survive better in their environment

have higher fitness

pass down their traits more often

All of these are correct

16.

A population of cockroaches was sprayed with an insecticide. Some cockroaches survived and produced a population of cockroaches that was resistant to this spray. What can BEST be inferred from this example?

species will adapt no matter what the environment

environment has no effect on the survival of an organism

Individuals with favorable variations survive and reproduce

Insecticides cause mutations that are passed on to the next generation

17.

Why is it important to finish ALL of an antibiotic, even if you feel better?

If all of the infectious bacteria are not killed, the bacteria may continue to multiply. Some of these bacteria may have a mutation that makes them resistant to the antibiotic. This could cause resistant bacteria to spread.

If all of the antibiotic is not used, the surviving bacteria may learn how to fight off the antibiotic, causing the sickness to get even worse.

If all of the antibiotic is not used, the bacteria may begin ingesting your skin cells, causing a new sickness to arise.

If all of the antibiotic is not used, the surviving bacteria may cooperate with other infectious bacteria, resulting in two separate infections at the same time.

100 %

Natural Selection

Total questions: 17

Worksheet time: 13mins

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