An element is defined as a substance that:a

is composed of more than one kind of atom.
b. is held together by covalent bonds.
c. cannot be broken into simpler substances by chemical reactions.
d. cannot burn.
e. is soluble in both acid and base.


C

Biology & Microbiology

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T cells are produced in the bone marrow but mature in the thyroid

Indicate whether the statement is true or false.

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Diastolic pressure reflects the

A. contraction of the atria. B. relaxation of the atria. C. contraction of the ventricles. D. relaxation of the ventricles. E. heart rate.

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Cell differentiation accounts for cells of an organism

becoming different in a. composition. b. structure. c. function. d. development. e. all of these.

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The CJVI has identified approximately 473 genes make up the core set of genes for prokaryotes. What did their findings suggest is the core set of genes in the human genome?

A) about 20,000 B) about 1000 C) about 2000 D) about 500

Biology & Microbiology