1. Which of the following would be an example of primary succession?



1Points
A
The regrowth of a forest after a fire.

B
The first growth on land uncovered when a glacier retreats.

C
The growth of wild plants on an abandoned farm.

D
The growth of seedlings after a flood.

2. Which would make the best pioneer species during primary succession?

1Points
A
bacteria and lichens

B
grasses and birch trees

C
lichens and grasses

D
bacteria, lichens, and grass

3. True or False: A population pyramid with a wide base has a population that is decreasing.

1Points
A
True

B
False

4. Which of the following are nonrenewable resources?

Select all that apply.

1Points
A
fossil fuels

B
Sunlight

C
nuclear power

D
wind and sunlight

5. Which of the following are renewable resources?

1Points
A
fossil fuels

B
metals and other minerals

C
plastic

D
wind and sunlight

6. Why does an algal bloom form?

1Points
A
from a lack of nutrients in the water

B
from a dead zone

C
from an excessive growth of algae, killing many other aquatic organisms

D
excess nutrients in the water