3. What is the niche of a gray wolf?
• Is it a consumer or producer?
– Consumer/carnivore – eats deer, moose,
sheep, birds, snakes, fish
• How do they interact with others?
– They live and hunt in packs
• Do they take care of their young?
– Yes – for 2 years
• Are they needed in the food web?
– Yes, they keep other populations in check.
4. Most living things produce more
offspring than will survive. A female
frog, for example, might lay
hundreds of eggs in a small pond.
In a few months, the population of
frogs in that pond will be about the
same as the year before. Why
won’t the pond become overrun
with frogs?
8. Questions
1. Which of these could cause a
decrease in the number of squirrels in
a population?
A An increase in cooperation with birds in
the area
B An increase in the squirrels’ territory
C An increase in competition with other nuteating animals
D An increase in the squirrels’ food supply
9. 2. There are many factors that influence
the population changes of an
ecosystem. Which of these does not
influence population size in an
ecosystem?
A Birthrates of animals
B Number of animals in habitats
C An animal’s weight
D The size of a habitat
10. 3. Which term refers to an environmental
factor that prevents a population from
increasing?
A. biotic factor
B.abiotic factor
C.immigration
D.limiting factor
11. 4. The largest population that an
environment can support is called its
A. carrying capacity.
B. limiting factor.
C. birth rate.
D. death rate.
12. 5. All of the following are examples of
limiting factors EXCEPT
A. food.
B. soil.
C. space.
D. weather conditions.
