Which of the following is NOT involved in some

way in the body’s first line of defense?
a. urination
b. diarrhea
c. gastric juice
d. complement
e. ciliated cells


Answer: d

Biology & Microbiology

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The bulk of the reabsorption of useful materials by the kidney takes place in the

A. renal corpuscle. B. proximal convoluted tubule. C. loop of Henle. D. distal convoluted tubule. E. collecting ducts.

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Male songbirds exposed only to the songs of other species will eventually sing

a. the other species' song b. a mixture of their own species' song and the song of the other species c. a perfect version of their own species' song d. a simplified version of their own species' song e. no song at all

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The trait of having more than ten fingers or toes is called

a. syndactyly. b. polydactyly. c. campodactyly. d. multidactyly. e. extradactyly.

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What makes a nutrient an essential nutrient to plants?

A. It is required for photosynthesis or respiration. B. It is required for normal growth and reproduction. C. It is part of photosynthetic structures. D. It is needed in large quantities by all plants.

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