24. Among the sea life in the tidal zone are many invertebrates and vertebrates.

Question

24.

Among the sea life in the tidal zone are many invertebrates and vertebrates. Scientists found that a tiny fish in this tidal zone feeds on multiple varieties of algae. In the absence of this fish, they found large changes in the community of organisms. This is an example of...

Commensalism

Trophic levels

Top predator

Keystone species

23.

Foxes and coyotes inhabit a similar ecological niche, but wherever they co-occur, the foxes tend to attempt to avoid habitats occupied by coyotes. This is an example of...

Predation

Competitive exclusion

Facultative commensalism

Obligate parasitism

21.

Plant and animal distributions are defined in large part by...

biotic factors

abiotic factors

climate

all of the above

Commensalism

Trophic levels

Top predator

Keystone species

Explanation / Answer

24.         Keystone species: it is a species that produces important effects on its environment affecting other organisms.

23.         Competitive exclusion: two species that compete for the same resources cannot coexist in the same habitat if the other ecological factors remain constant.

21. All the above.

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