Cancer

A) is usually caused by a single mutation in a key gene.
B) is more likely to develop in older people or people who have been exposed to mutagens (mutation-causing agents).
C) usually involves a mutation in the BRCA genes.
D) is primarily an inherited, and not an environmental, disease.


B

Environmental & Atmospheric Sciences

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The ________ is the most prominent feature on the ocean floor

Fill in the blank(s) with correct word

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Deserts are classified on the basis of

A. temperature. B. precipitation. C. pressure. D. plant and animal life.

Environmental & Atmospheric Sciences

Sea otters play a role in maintaining the biodiversity of which ecosystem?

a. Tidepools b. coastal kelp forests c. coastal sandy beaches d. open ocean areas e. Estuaries

Environmental & Atmospheric Sciences

The Roman Empire introduced______________ to Europe.

-currency -specialization of goods -exploration -both a common infrastructure and specialization of goods -a common infrastructure

Environmental & Atmospheric Sciences