AP BIOLOGY

ECOLOGY

ENERGY FLOW AND PRIMARY PRODUCTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In a food web, primary consumers get their energy by-
A
engaging in photosynthesis.
B
breaking down dead organisms.
C
eating other primary consumers.
D
eating organisms known as producers.
Explanation: 

Detailed explanation-1: -The organisms that eat the producers are the primary consumers. They tend to be small in size and there are many of them. The primary consumers are herbivores (vegetarians). The organisms that eat the primary consumers are meat eaters (carnivores) and are called the secondary consumers.

Detailed explanation-2: -Consumers constitute the upper trophic levels. Unlike producers, they cannot make their own food. To get energy, they eat plants or other animals, while some eat both.

Detailed explanation-3: -A producer is an organism which produces its own food through photosynthesis. 3. A consumer is an organism which does not make its own food but must get its energy from eating a plant or animal. 4. A decomposer is an organism which digests or breaks down dead plants and animals.

Detailed explanation-4: -Answer and Explanation: Organisms that obtain their energy from producers or other consumers are heterotrophs. This group of living beings consumes other organisms as food: they feed on primary producers and / or consumers to satisfy their metabolic needs.

Detailed explanation-5: -Primary Consumer-Animals that consume only plant matter. They are herbivores-eg rabbits, caterpillars, cows, sheep, and deer. Secondary Consumer-Animals that eat primary consumers (herbivores). Tertiary Consumer-Animals that eat secondary consumers ie carnivores that feed on other carnivores.

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