Biology Semester Exam Review

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What is a producer in a food chain?

Back

A producer is an organism that can make its own food, usually through photosynthesis, and is the first level in a food chain.

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How much energy do primary consumers receive from producers?

Back

Primary consumers receive about 10% of the energy from producers. If producers have 5000 kcals, primary consumers receive 500 kcals.

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What is a primary consumer?

Back

A primary consumer is an organism that eats producers; they are usually herbivores.

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What is a tertiary consumer?

Back

A tertiary consumer is an organism that eats secondary consumers; they are usually carnivores.

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What is a carnivore?

Back

A carnivore is an animal that primarily eats other animals.

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What is a vestigial structure?

Back

A vestigial structure is a body part that has lost its original function through evolution.

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What is predation?

Back

Predation is an ecological relationship where one organism (the predator) hunts and eats another organism (the prey).

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What is photosynthesis?

Back

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.

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What is an ecological relationship?

Back

An ecological relationship is the interaction between different species in an ecosystem, such as predation, competition, and mutualism.

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What is competition in ecology?

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Competition occurs when two or more organisms vie for the same resources in an ecosystem.