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Factors of Natural Selection

Total questions: 14

Worksheet time: 7mins

Name
Class
Date
1.
Where the better adapted organisms survive to pass traits along to offspring.
a)
Evolution
b)
Natural Selection
c)
Extinction
d)
Artifical Selection
2.
Why are advantageous traits more likely to be passed onto offspring?
a)
Because they are more likely to survive and reproduce.
b)
Because they come from dominant alleles.
c)
Because they come from recessive alleles.
d)
Because the trait is an acquired phenotype.
3.
Almost all adaptations started off as?
a)
selective breeding
b)
physiological
c)
structural
d)
mutation
4.

Mutations are a change in what?

a)

DNA

b)

tRNA

c)

protein

d)

rRNA

5.
The differences among a species, like different bird beaks, are called
a)
genes.
b)
variations.
c)
traits.
d)
theories.
6.

Mutations are important because they bring about

a)

death of the organism in which they develop

b)

genetic variation needed for a population to evolve

c)

benefits for the individual, not for the population

d)

changes in genotype, but not phenotype

7.

Why is competition important for natural selection?

a)

It shows which variations are more successful, allowing the organisms with those variations to survive.

b)

It causes organisms, regardless of which traits they have, to die out, reducing the population size.

c)

It causes organisms to get stronger due to having to outcompete other species.

d)

Competition is not important for natural selection.

8.

What is most likely to happen to moth populations in the picture shown?

a)

Light moths--hunted easily, dark moths--population increase

b)

Dark moths--hunted easily, dark moths--population increase

c)

Light moths--hunted easily, light moths--population increase

d)

Lights moths will change their color to match dark moths.

9.
Why is the mouse population changing over time?
a)
The light mice can reproduce more successfully than the dark mice
b)
The hawks eat more dark mice than light mice because the dark mice taste better
c)
The hawks eat more light mice than dark mice because they can see the light mice more easily
d)
The hawks eat more dark mice than light mice because they can see the dark mice more easily
10.
What process is being shown in this image?
a)
Variation
b)
Natural Selection
c)
Selective Breeding
d)
Homeostasis
11.
Which organisms are most likely to survive?
a)
the best adapted
b)
the fastest
c)
the strongest
d)
the most domesticated (tamed)
12.

In a cold environment what would be some adaptive traits? Sellect all that apply.

a)

thick blubber

b)

thick fur

c)

thin fur

d)

strong muscles

13.
Organisms with differences/variations that are helpful will ______________________
a)
live longer
b)
become extinct
c)
show no change
14.

The gradual change in a species over time

a)

evolution

b)

population

c)

variation

d)

offspring

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