Which type of epithelial cells act in absorption and secretion?

a. Columnar and stratified squamous
b. Columnar and cuboidal
c. Simple squamous and columnar
d. Cuboidal and simple squamous
e. Stratified squamous and columnar


b

Biology & Microbiology

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How many "turns" are present in insulin chain B?

a. 1 b. 2 c. 3 d. 4

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Indicate whether the statement is true or false

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Solar radiation:a

powers the hydrologic and other biogeochemical cycles. b. is essential for chemosynthesis. c. is the product of a massive nuclear fission event. d. is eventually released from fossil fuels. e. is eventually released via decomposition.

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