Ecology

Intro

In terms of the difficulty of between cell biology and ecology on the Living Environment Regents, generally, ecology questions are easier. There is energy , transferred, and stored, and it is important to know this to understand about how the biotic factors interact. There are energy pyramids, food chains, and even more complex, food webs.

Sample Problem

Question source

21 The sequence that best illustrates the flow of energy through an ecosystem is
(1) sunlight → plant → wolf → rabbit
(2) plant → sunlight → rabbit → wolf
(3) sunlight → plant → rabbit → wolf
(4) wolf → rabbit → plant → sunlight

Solution

It is choice 3 because sunlight has the most energy. In a food chain or a food pyramid, between plants and animals, plants have the most energy because they are the producers through photosynthesis. Then, primary consumers eat the plants, and they are herbivores oor plant-eaters. Next, the secondary consumers eat the primary consumers. As a result, the energy is transferred 10% to each level of the food pyramid and is used 90% for its actvities like growth, sleeping, or movement.



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