The process by which cells become specialized is called _____.

A) differetitation
b) totipotency
c) cloning
d) deseperation


Answer: A) differetitation

Biology & Microbiology

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Heart excitation originates in the

a. atrioventricular node. b. intercalated disk. c. sinoatrial node. d. pericardium. e. endothelium.

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________ refers to heat from deep underground sources used as a source of energy

Fill in the blank(s) with correct word

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Which of the following does not use RNA as the genome?

A. Influenza virus B. Poxvirus C. Poliovirus D. Rabies virus

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Photosystems are:

A) arrangements of chloroplasts within the cells lining the surface of leaves. B) the wavelengths of light that reach the earth from the sun. C) arrangements of light-catching pigments within chloroplasts. D) arrangements of thylakoid membranes within the plant cell wall. E) arrangements of ATP-synthase molecules within chloroplasts.

Biology & Microbiology