Ch 4: Climate - Section 1: Succession

Human impact on ecosystems would most likely lead to secondary succession over primary succession. Please select the best answer from the choices provided T F

T

Succession is always caused by natural events. Please select the best answer from the choices provided T F

F

Which of the following about secondary succession is not true? a. It occurs in ecosystems without soil. b. It occurs in ecosystems that are already established. c. It reduces the number of species in an ecosystem. d. It is initiated by a disruptive event.

a. It occurs in ecosystems without soil.

Which of the following is an example of a pioneer species? a. fungus b. trees c. shrubs d. grass

a. fungus

How are primary and secondary succession similar? a. Both primary and secondary succession involve ecosystems that have no soil. b. Both primary and secondary succession involve ecosystems recovering from a disruptive event. c. Both types of succession require a pioneer species to aid recovery of ecosystems. d. Primary and secondary succession have no similarities.

b. Both primary and secondary succession involve ecosystems recovering from a disruptive event.

Succession performs a variety of functions within ecosystems. What is the main reason that succession is important in maintaining ecosystems? a. Succession allows the earth to change. b. Succession ultimately leads to climax communities, which are stable and sustainable. c. Succession keeps pollution from harming ecosystems. d. Succession allows simple organisms to play a larger role in ecosystems than normal

b. Succession ultimately leads to climax communities, which are stable and sustainable.

Which of the following could be both a natural and a human cause of succession? a. lava flow b. overcutting c. fire d. wind

c. fire

Which of the following would most likely be a cause of primary succession? a. farming b. overhunting c. volcano d. defoliation

c. volcano

How is a climax community different than a primitive community? a. The types of organisms present in a climax community are more complex. b. Primitive communities tend to have less biodiversity than climax communities. c. Climax communities are more stable than primitive communities. d. All of the above

d. All of the above

Succession is affected by _______. a. climate b. soil c. geography d. all of the above

d. all of the above