Which statement best describes the relationship between cells, DNA, and proteins?

Down syndrome is a genetic disorder caused by the presence of an extra chromosome in the body cells of humans. This extra chromosome occurs in a gamete as a result of

Genes involved in the production of abnormal red blood cells have an abnormal sequence of

The reason that organisms can NOT produce populations of unlimited size is that

Which statement describing a cause of extinction includes the other three?

In the transfer of energy from the Sun to the ecosystems, which molecule is one of the first to store this energy?

Which statement best describes how a vaccination can help protect the body against disease?

Organisms that are able to manufacture organic nutrients from substances in the abiotic environment are classified as

Which factor would have the greatest effect on the flow of energy into an ecosystem?

Which structures carry out life functions within cells?

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