Which of these is a heterotroph?

A. a phytoplanktonic diatom
B. a fish
C. an oak tree
D. a corn plant
E. a moss plant


Answer: B

Biology & Microbiology

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Athletes and bodybuilders who use growth hormone to improve athletic performance and muscle mass

risk the development of a. hair loss. b. gigantism. c. low blood pressure. d. diabetes. e. hypothyroidism.

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Concentrations of solutes are greatest in

A) springs. B) rivers. C) lakes. D) oceans.

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An animal whose kidneys have a high percentage of long-looped nephrons probably lives in a ________ environment

A) desert B) seasonally wet C) rain-forest D) saltwater E) freshwater

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