Biology Semester Exam Review (1)

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What is commensalism?

Back

A type of symbiotic relationship where one organism benefits while the other is neither helped nor harmed. Example: A remora fish attaching to a shark.

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What is overfishing?

Back

The practice of catching fish and other marine species at a rate faster than they can reproduce, leading to population decline.

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What is a possible effect of overfishing?

Back

A reduction in marine diversity, causing some species to become endangered or collapsing entire marine ecosystems.

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What is the order of biological organization from smallest to largest?

Back

Organism, population, community, ecosystem.

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What is nitrogen fixation?

Back

The process of converting nitrogen gas from the atmosphere into a usable form for plants, typically by bacteria.

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What is predation?

Back

A biological interaction where one organism (the predator) kills and eats another organism (the prey).

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What is parasitism?

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A relationship where one organism benefits at the expense of another, often harming it in the process.

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What is competition in ecology?

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An interaction between organisms or species in which both are harmed as they compete for limited resources.

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What is denitrification?

Back

The process by which bacteria convert nitrates in the soil back into nitrogen gas, returning it to the atmosphere.

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What is eutrophication?

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A process where water bodies become overly enriched with nutrients, leading to excessive growth of algae and depletion of oxygen.