Select all that apply.Which of the following are examples of symbiosis? Select all that apply.

Species richness is

Question 2

Select all that apply.Which of the following are examples of symbiosis? Select all that apply.

Question 3

Select one answer.In Africa, grasses are the main vegetation in savanna communities. Acacias and other trees are few and widely scattered. Elephants range over very large territories and are not very abundant in any one location. However, they strongly affect the community by uprooting and consuming trees and shrubs, maintaining suitable habitat for grasses and grassland animals. Many species of birds and insects live in the savanna grasses. Based on this information, which of the species or groups above would best be described as keystone species?

Question 4

Select one answer.The effect of wolves on the survival and growth of young trees along rivers in Yellowstone National Park is a good example of…

Question 5

Select one answer.Occasionally American alligators are sighted in rivers or lakes in New York City, far north of their usual range. These alligators are usually escaped pets. There is no self-sustaining population of alligators in New York, and they have no important influence on other populations there. Is the American alligator a member of the ecological community in New York?

Question 6

Select one answer.Which of the following is an indirect interspecific interaction?

Question 7

Select one answer.Which of the following would probably have a greater richness of native plant species per acre?

Question 8

Select one answer.In Africa, grasses are the main vegetation in savanna communities. Acacias and other trees are few and widely scattered. Elephants range over very large territories and are not very abundant in any one location. However, they strongly affect the community by uprooting and consuming trees and shrubs, maintaining suitable habitat for grasses and grassland animals. Many species of birds and insects live in the savanna grasses. Which of the species or groups above would best be described as foundation species?

Question 9

Select one answer.Which of the following is a direct interspecific interaction?

Question 10

Select one answer.Which of the following is known to be a keystone species in the kelp forest ecosystem?

 

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