Keystone Test Keystone Biology: Ecology and Homeostasis 3

Question 1

What is the term for the geographic area where an organism lives?

Accepted Answer

Habitat

Answer

A habitat is the specific environment where an organism lives and finds food, shelter, and mates.

Question 2

Which hormone helps regulate blood glucose levels by lowering them?

Accepted Answer

Insulin

Answer

Insulin is released by the pancreas when blood glucose is high, signaling cells to absorb and use glucose.

Question 3

What is primary succession?

Accepted Answer

Ecological change beginning in an area with no prior life

Answer

Primary succession occurs on bare rock or newly exposed land with no existing soil or organisms.

Question 4

Which of the following is an example of an abiotic factor in an ecosystem?

Accepted Answer

Temperature

Answer

Abiotic factors are non-living components of an ecosystem, such as temperature, water, light, and soil.

Question 5

What is biodiversity?

Accepted Answer

The variety of living organisms in an area

Answer

Biodiversity refers to the variety of species, genetic variation, and ecosystems in a given area.

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