The nearest living relatives of alligators and crocodiles are:

A. snakes
B. birds
C. turtles
D. lizards
E. manatees


B. birds

Biology & Microbiology

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The act of nursing stimulates the contraction of smooth muscle cells in the breast. If a newborn infant is unable to nurse, then

A. progesterone secretion is not inhibited. B. milk is not produced. C. oxytocin is not secreted. D. prolactin is not secreted. E. prostaglandins are not secreted.

Biology & Microbiology

Microbes sometimes make metals such as mercury more volatile and lipid soluble by ________.

A. phosphorylation B. methylation C. aggregation D. None of the choices are correct.

Biology & Microbiology

Fossils of Cooksonia, which date to approximately ____ years ago, represent the oldest known fossils of vascular

plants.

a. 1.5 billion b. 425 million c. 250 million d. 125 million e. 17 million

Biology & Microbiology

Cattle benefit when _____ in their gut help them digest plant material

a. trypanosomes c. ciliates b. diatoms d. foraminiferans

Biology & Microbiology