High School Biology : Understanding Requirements for Life and Cell Theory

Study concepts, example questions & explanations for High School Biology

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Example Questions

Example Question #42 : Attributes Of Life

Which of the following illustrates the cell theory?

Possible Answers:

Many times, humans crave salt because there is an internal deficiency of salt in the blood. 

Cells commit suicide when their DNA is damaged.

The bacteria on the chicken that has been out overnight does not grow on its own but divides and multiplies from one or more original cells.

Plants are able to grow and move towards sunlight, that's why the plants in my room are tilted towards the window.

Humans sweat to maintain body temperature in a certain range. Sweating helps to release heat.

Correct answer:

The bacteria on the chicken that has been out overnight does not grow on its own but divides and multiplies from one or more original cells.

Explanation:

The cell theory is the idea that 1) all living things are made of one or more cells, 2) cells are the basic unit of life and 3) all cells come from other cells.

Bacteria, whether infecting humans or foods, originates from other bacterial cells. That illustrates the third point of the cell theory. 

Example Question #1001 : High School Biology

What is the basic unit of life?

Possible Answers:

A chromosome

A cell

A molecule

DNA

An atom

Correct answer:

A cell

Explanation:

The basic unit of life is a cell and this is defined by the cell theory. It can live on its own, unicellularly, as in bacteria, or it can be a part of a multicellular organism. 

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