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Environmental Changes

Total questions: 32

Worksheet time: 23mins

Name
Class
Date
1.

a)

F

b)

G

c)

H

d)

J

2.

a)

A

b)

B

c)

C

d)

D

3.

a)

A

b)

B

c)

C

d)

D

4.

a)

A

b)

B

c)

C

d)

D

5.

a)

A

b)

B

c)

C

d)

D

6.
A small marine area has phytoplankton as its only producer.  Should the marine biologist be concerned about this ecosystem?
a)
No the fish do not need the phytoplanton. Since there are so many fish, there is high biodiversity.
b)
Yes, this ecosystem has low biodiversity.  Without a producer the herbivores will die out leaving no food.
c)
Yes, this system has high biodiversity; however the fish can adapt and get food from another source.
d)
Yes, the fish will overate to get all of the phytoplankton that is left, then they will die.
7.

The lionfish is a venomous fish found primarily in the Red Sea and the Indian Ocean. In the 1990s, lionfish were accidentally released into the Atlantic Ocean, where they found abundant resources and favorable environmental conditions. Which of the following scenarios is most likely to result in the lionfish having a major impact on the communities into which they were introduced?

a)

With no natural predators, the lionfish population will become very large.

b)

Some native species of invertebrates will develop a resistance to lionfish venom.

c)

Random mating will allow the lionfish population to reach Hardy-Weinberg equilibrium.

d)

A virus that specifically infects lionfish will become more prevalent.

8.
Variation happens as a result of the exchange of genetic information as it is passed fromparent to offspring.Which of the following is true about inherited variation?
a)
Variation can influence the resources that are available to an organism.
b)
Variation can influence whether organisms are more likely to survive to reproduce.
c)
Variation can influence the amount of rainfall in an ecosystem
d)
Variation can influence the amount of available food in an ecosystem
9.
Which statement best explains how natural selection occurs?
a)
when adaptations help an organism reproduce and survive.
b)
when organisms are geographically isolated.
c)
when an organism’s offspring grow vestigial structures.
d)
when characteristics from the parent organism are inherited.
10.
Forests are often preserved to protect biodiversity. This helps preserve the unique characteristics of the organisms that live there. Sometimes these forests are divided into separate sections that are spread out instead of one continuous forest. This is known as forest fragmentation. Which types of organisms will be the least likely to be affected by forest fragmentation?
a)
herbivorous birds that are able to migrate great distances
b)
omnivores that hibernate in winter in order to conserve energy
c)
omnivores that burrow underground deep in to the soil.
d)
herbivorous mammals that are dependent upon specific plants for food
11.
During the early settlement of the United States, pioneers cut down large tracts of forests on the east coast to use for home construction, for firewood, and to create cleared spaces to plant crops.What was the most likely effect of this kind of action?
a)
decreased plant and animal diversity
b)
decreased human populations
c)
decreased carbon dioxide production
d)
increased organism biodiversity.
12.

a)

A

b)

B

c)

C

d)

D

13.

a)

A

b)

B

c)

C

d)

D

14.

a)

F

b)

G

c)

H

d)

J

15.

a)

A

b)

B

c)

C

d)

D

16.

a)

A

b)

B

c)

C

d)

D

17.

a)

A

b)

B

c)

C

d)

D

18.

a)

A

b)

B

c)

C

d)

D

19.

a)

A

b)

B

c)

C

d)

D

20.

a)

F

b)

G

c)

H

d)

J

21.

a)

F

b)

G

c)

H

d)

J

22.

a)

A

b)

B

c)

C

d)

D

23.

a)

A

b)

B

c)

C

d)

D

24.

a)

F

b)

G

c)

H

d)

J

25.

a)

A

b)

B

c)

C

d)

D

26.

a)

A

b)

B

c)

C

d)

D

27.

a)

F

b)

G

c)

H

d)

J

28.

a)

F

b)

G

c)

H

d)

J

29.

a)

F

b)

G

c)

H

d)

J

30.

a)

F

b)

G

c)

H

d)

J

31.

a)

A

b)

B

c)

C

d)

D

32.

a)

F

b)

G

c)

H

d)

J

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