b. interacting populations.
c. ecological equivalents.
d. the same species.
Question 8
Marks: 1
An alder tree is not a pioneer species because
Choose one answer.
a. alder trees are a form of lichen.
b. smaller organisms come before trees in succession.
c. pioneer species are always animals.
d. it is not one of the trees that make up the final forest.
Question 9
Marks: 1
Which of these is an example of parasitism?
Choose one answer.
a. A leech feeds on a hosts blood.
b. A polar bear kills and eats a seal.
c. A squirrel stores food in a tree hole.
d. A lion defends its territory.
Question 10
Marks: 1
Lions eat zebras. Zebras are part of the lions
Choose one answer.
a. biotic factors.
b. local habitat.
c. abiotic conditions.
d. ecological niche.
Question 11
Marks: 1
In 1988 several large forest fires occurred in Yellowstone National Park. What process occurred after these fires?
Choose one answer.
a. symbiotic succession
b. pioneer succession
c. secondary succession
d. primary succession
Question 12
Marks: 1
What might happen if an organism with type III survivorship were introduced into a new environment with no predators?
Choose one answer.
a. Its population would increase rapidly.
b. Its birth rate would decrease.
c. It would become extinct.
d. Its survivorship would change to type I.
13
Marks: 1
A herd of caribou has more births than deaths and more immigration than emigration. What will most likely happen to the size of the herd?
Choose one answer.
a. It will increase.
b. It will increase, and then decrease.
c. It will stay the same.
d. It will decrease.
15
Marks: 1
The European red squirrel population is declining due to competition with the North American gray squirrel. Most likely, what will eventually happen to the red squirrel?