Multiple Choice
In the context of ecology, what is a keystone organism?
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48. Ecology
Introduction to Ecology
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Which of the following is true about top predators in an ecosystem?
A
They are always herbivores.
B
They are the primary producers of energy.
C
They have no natural predators.
D
They are the most numerous organisms in an ecosystem.
Verified step by step guidance1
Understand the role of top predators in an ecosystem. Top predators, also known as apex predators, are at the top of the food chain and have no natural predators.
Consider the characteristics of herbivores. Herbivores are organisms that primarily consume plants, and they are not typically top predators.
Examine the role of primary producers. Primary producers, such as plants and algae, convert solar energy into chemical energy through photosynthesis and are not predators.
Evaluate the population size of top predators. Top predators are usually less numerous than other organisms in an ecosystem due to energy transfer inefficiencies in the food chain.
Conclude that the statement 'They have no natural predators' is true for top predators, as they occupy the highest trophic level in an ecosystem.
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