The basic life functions of an organism are carried on by

During which process do cells use oxygen to release stored energy?

Abnormal cell division in humans may result in

Worm, cat, spider, crab: What do all four animals have in common?

The fur of the snowshoe rabbit changes to a lighter color in the winter. This allows the rabbit to survive in its surroundings. This change is an example of

In living things, traits are passed on from one generation to the next by the transfer of

Which human organ system produces most of the hormones that regulate body fuctions?

Which process involves choosing certain organisms reproduce with one another in order to pass on specific, desirable traits to their offspring?

A structure that carries a single unit of hereditary information is a

The sum of all chemical reactions that take place within an organism is known as

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