Question

an alligator is an example of a keystone species. what is the definition of a keystone species?
a species that prefers to reside on top of or close to stone
a species with significant influence on the structure and functioning of that ecosystem
a species with no influence on the ecosystem and could be safely removed

Explanation:

A keystone species is defined as one that has a disproportionately large effect on its environment relative to its abundance. It plays a crucial role in maintaining the structure of an ecological community, affecting many other organisms in an ecosystem and helping to determine the types and numbers of various other species in the community. The first option is a misinterpretation of the term "keystone" (referring to stone in a literal sense, not the ecological role). The third option is incorrect as keystone species have a major influence, not no influence. The second option aligns with the ecological definition of a keystone species.

Answer:

B. a species with significant influence on the structure and functioning of that ecosystem