The secondary lamellae are:

a. Small, round orbs c. Thick, flat plates
b. Large, round orbs d. Thin, flat plates


D

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Welder certification can be divided into ____ major areas.

A. two B. three C. four D. five

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To prevent the liquid contents in a pipe from freezing, engineers often apply coils of heated wire or tubing called:

a. Insulation b. Heat shielding c. Heat tracing d. Steam traps

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The semilunar valves prevent backflow into the

A) atria. B) aorta. C) ventricles. D) pulmonary trunk. E) venae cavae.

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Soil detritivores feed principally on ________

A) larger, but defenseless animals B) dead tissues C) microorganisms D) smaller organisms E) plant roots

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