Biology Final Exam - Fall

Front

What is primary succession?

Back

Primary succession is the process of ecological change that occurs in an area where no soil exists, such as bare rock exposed by a retreating glacier.

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How do trees obtain energy?

Back

Trees obtain energy by producing food through photosynthesis, a process that converts sunlight, carbon dioxide, and water into glucose and oxygen.

Front

What are the reactants needed for photosynthesis?

Back

The reactants for photosynthesis are water, carbon dioxide, and sunlight.

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What is an omnivore?

Back

An omnivore is an organism that eats both plants and animals. For example, a mouse is an omnivore.

Front

What is the role of helicase in DNA?

Back

Helicase is an enzyme that breaks the hydrogen bonds between base pairs of DNA, allowing the DNA strands to separate during replication.

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What is the difference between primary and secondary succession?

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Primary succession occurs in lifeless areas without soil, while secondary succession occurs in areas where a disturbance has destroyed an existing ecosystem but soil remains.

Front

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.

Front

What is a food web?

Back

A food web is a complex network of feeding relationships among various organisms in an ecosystem, showing how energy and nutrients flow.

Front

What is the function of chlorophyll?

Back

Chlorophyll is a green pigment found in plants that absorbs light energy for photosynthesis.

Front

What are producers in an ecosystem?

Back

Producers are organisms that create their own food, typically through photosynthesis, and form the base of the food chain.