Unit 3 Test Study Guide

Question 1

Niche

Answer 1

The role an organism plays in a community.

Question 2

Realized Niche vs Fundamental Niche

Answer 2

The Fundamental Niche is the potential mode of existence of the species, given its adaptations. The realized niche is the actual mode of existence of a species resulting from its adaptions as well as from competition with other species and it can only be the same size as or smaller than the fundamental niche.

Question 3

mutualism

Answer 3

when 2 or more species benefit from each other

Question 4

Commensalism

Answer 4

a relationship between individuals of two species in which one species obtains food or other benefits from the other without either harming or benefiting the latter.

Question 5

Parasitism

Answer 5

when an organism benefits from another organism without helping it

Question 6

Photosynthesis

Answer 6

The way plants turn nutrients (ex: sunlight/nitrogen) into energy

Question 7

Cellular respiration

Answer 7

the way plants and animals release carbon back into the atmosphere

Question 8

nitrogen fixation

Answer 8

Bacteria takes nitrogen atoms and fixes them so they can be used by other organisms

Question 9

denitrification

Answer 9

the removal of nitrogen from something