Life Science Semester One Review

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What is a cell?

Back

The basic unit of life that makes up all living organisms.

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What is the function of a nucleus in a cell?

Back

The nucleus controls the cell's activities and contains genetic material (DNA).

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What do mitochondria do?

Back

Mitochondria are known as the powerhouse of the cell; they produce energy through cellular respiration.

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What is the role of chloroplasts?

Back

Chloroplasts are found in plant cells and are responsible for photosynthesis, converting sunlight into energy.

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What is a scientific theory?

Back

A well-substantiated explanation of an aspect of the natural world that is based on a body of evidence.

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What is a scientific law?

Back

A statement based on repeated experimental observations that describes some aspects of the universe.

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What is active transport in cells?

Back

The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

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What is passive transport?

Back

The movement of molecules across a cell membrane without the use of energy, typically from high to low concentration.

Front

What is a dependent variable in an experiment?

Back

The variable that is measured and affected in an experiment, often responding to changes in the independent variable.

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What is an independent variable in an experiment?

Back

The variable that is changed or controlled in a scientific experiment to test its effects on the dependent variable.