The main causes of species extinction include:
_____ climate change
_____ introduced species
_____ ecosystem stability
_____ direct exploitation
_____ habitat loss
_____ range expansion
__X__ climate change
__X__ introduced species
_____ ecosystem stability
__X__ direct exploitation
__X__ habitat loss
_____ range expansion
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In which of the following animals would you NOT find an endoskeleton?
A. starfish B. sea sponge C. crocodile D. shark E. beetle
Oxidase-positive, glucose-positive (oxidatively) gram-negative bacilli that cannot grow on MacConkey agar include:
a. Pseudomonas. b. Vibrio. c. Stenotrophomonas. d. Sphingomonas.
The anterior pituitary hormone which has a generalized effect, having receptors on almost every cell in
the body, is
a. prolactin. b. growth hormone. c. gonadotropin. d. ADH. e. ACTH.
How many electrons are in the innermost
electron shell of a phosphorus atom?
a. 1 b. 2 c. 3 d. 5 e. 8