Module 6

Question 1

The greatest density of species occurs at the North POle

Answer 1

False

Question 2

Species in the tropics should have

Answer 2

narrow niches because they experience stable conditions

Question 3

Tropical species are

Answer 3

most at risk from climate change because tropical species likely have narrow niches.

Question 4

Dan Janzen argued that tropical communities contain more species because

Answer 4

tropical environments favor specialized niches, which limits gene flow and promotes speciation.

Question 5

Carbon is found only in plants and animals

Answer 5

False

Question 6

Carbon Dioxide enters the atmosphere when . . .

Answer 6

plants burn in a wildfire
organisms respire
organisms decompose

Question 7

Humans influence the carbon cycle by

Answer 7

mining carbon-based materials that were buried over millions of years
combusting carbon-based fuels to generate power
planting trees to generate timber for the building industry.

Question 8

The atmosphere is changing because

Answer 8

carbon is being added faster than it is removed.

Question 9

True of False:

A climate-envelop model estimates the fundamental niche of a species.

Answer 9

False

Question 10

Which approach do biologists use most commonly to predict how species will respond to climate change?

Answer 10

climate envelope models

Question 11

Which organisms could be affected by climate change

Answer 11

domestic animals reared for food
insects and bacteria that cause disease
plants and fungi used to make medicines
large animals that attract tourists