Balance is maintained by 

A. the tympanum.
B. ear bones.
C. semicircular canals.
D. the auditory tube.


C. semicircular canals.

Biology & Microbiology

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Trophic-level transfer efficiency averages about

A. 1%. B. 25%. C. 33%. D. 10%. E. 0.1%.

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_____ conducts water and minerals through a plant, and _____ conducts sugars

a. Phloem; xylem c. Xylem; phloem b. Cambium; phloem d. Xylem; cambium

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When a plant moves sugars from its leaves to its roots, the sink is the

a) leaves. b) roots. c) stems. d) same as the source.

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Which tissue stores fat?

A. Connective tissue B. Muscle tissue C. Adipose tissue D. Hepatic cells

Biology & Microbiology