Species Interaction

Question 1

Symbiosis

Answer 1

Any type of close or long-term biological interaction between two different species

Question 2

Mutualism

Answer 2

Necessary and positive interaction, both species benefit

Question 3

Commensalism

Answer 3

One species benefits and the other is neither benefited nor harmed

Question 4

Amensalism

Answer 4

One species is harmed and the other is neither benefited nor harmed

Question 5

Parasitism

Answer 5

One species benefits at the expense of the other, usually keep their host alive

Question 6

Competition

Answer 6

The active demand between two or more organisms for a resource, each competitor is inhibited in some way by the interaction

Question 7

Moderate Interspecific Competition

Answer 7

Niches are narrower

Question 8

Intense Interspecific Competition

Answer 8

Results in a very narrowed realised niche as species specialise to exploit a narrower range of resources

Question 9

Intense Intraspecific Competition

Answer 9

Results in a broader realised niche as individuals are forced to occupy suboptimal conditions

Question 10

Gause’s Exclusion Principle

Answer 10

Two or more resource-limited species, having identical patterns of resource use, cannot coexist in a stable environment: one species will be better adapted and will out-compete or otherwise eliminate the other(s)

Question 11

Niche Differentiation

Answer 11

Interspecific competition is usually less intense than intraspecific competition because niche overlap between species is not complete. Species with similar ecological requirements may reduce competition by exploiting different microhabitats within the ecosystem

Question 12

Predation

Answer 12

One organism, the predator, kills and eats another organism, its prey

Question 13

Disease

Answer 13

Pathogens invade organism’s bodies usually killing or damaging their host