This decline disrupted the ecosystem. Following a study of the wolves’ impact, ecologists regarded wolves as the (a)______ species of the ecosystem, as their absence caused a (b)______ effect on the ecosystem.

a.
1.keystone
2.prey
3.diverse

b.
1. direct
2.domino
3.benifical

Respuesta :

A:  Keystone
B: Direct
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Answer:

This decline disrupted the ecosystem. Following a study of the wolves’ impact, ecologists regarded wolves as the (a) keystone species of the ecosystem, as their absence caused a (b) domino effect on the ecosystem. The correct answer is A1 and B2.