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

Niche

Answer

Biome

Answer

Population

Question 2

Which hormone helps regulate blood glucose levels by lowering them?

Accepted Answer

Insulin

Answer

Glucagon

Answer

Adrenaline

Answer

Cortisol

Question 3

What is primary succession?

Accepted Answer

Ecological change beginning in an area with no prior life

Answer

Recovery of an ecosystem after a disturbance

Answer

The change of one species into another

Answer

The migration of organisms to new habitats

Question 4

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

Accepted Answer

Temperature

Answer

Grass

Answer

Bacteria

Answer

Deer

Question 5

What is biodiversity?

Accepted Answer

The variety of living organisms in an area

Answer

The number of plants in a forest

Answer

The rate of photosynthesis in an ecosystem

Answer

The total mass of organisms in a habitat

Question 6

Which process in the nitrogen cycle converts nitrogen gas from the atmosphere into a usable form for plants?

Accepted Answer

Nitrogen fixation

Answer

Denitrification

Answer

Nitrification

Answer

Decomposition