1. 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

2. true or false: a population pyramid with a wide base has a population that is decreasing.

1points
a
true

b
false

3. which of the following are nonrenewable resources?

select all that apply.

1points
a
fossil fuels

b
sunlight

c
nuclear power

d
wind and sunlight

4. which of the following are renewable resources?

1points
a
fossil fuels

b
metals and other minerals

c
plastic

d
wind and sunlight

5. in the logistic growth model, as a population approaches the carrying capacity, what happens to its growth rate?

1points
a
becomes exponential

b
doubles

c
increases

d
slows to zero