Concerning species survival, which status is of greatest concern?

a. threatened
b. endemic
c. critical
d. endangered
e. serious


ANSWER: d

Biology & Microbiology

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Often it is important for health reasons to induce labor (i.e., smooth muscle contractions) in pregnant women. The drugs used for this purpose would most closely resemble

A. oxytocin. B. antidiuretic hormone. C. prolactin. D. cortisol.

Biology & Microbiology

The osmoreceptors that the body uses to detect and react to situations such as dehydration are located

in the

a. hypothalamus. b. adrenal glands. c. efferent arteriole. d. kidneys. e. posterior pituitary.

Biology & Microbiology

When Lederberg and Tatum performed their experiments on gene transfer in bacteria that lead to our understanding of conjugation, what were their controls?

A) They mixed strains A and B together. B) They put strain A on one side of a U-shaped tube and strain B on the other, with a filter between them. C) They found bio- met- cells. D) They plated strain A and strain B separately onto minimal media plates to screen for spontaneous prototrophs. E) They observed mating bridges with transmission electron microscopes.

Biology & Microbiology

The cells of prokaryotic organisms lack a _______.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology