The egg cells of a horse contain 32 chromosomes. how many chromosomes are in the horses liver cell?
a. 16
b. 32
c. 64
d. 128
Answer: c. 64
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A. Weismann and Nageli. B. Griffith. C. Avery, MacLeod, and McCarty. D. Hershey and Chase. E. Watson, Crick, Wilkins, and Franklin.
Insects have
a. simple eyes. b. ocelli. c. ciliary eyes. d. compound eyes. e. "camera" eyes
The function of the "ciliary escalator" is to
A) propel inhaled dust and microorganisms toward the mouth, away from the lower respiratory tract. B) remove microorganisms from the gastrointestinal tract. C) remove microorganisms from the lower respiratory tract. D) trap microorganisms in mucus in the upper respiratory tract. E) trap inhaled dust and microorganisms in mucus and propel it away from the lower respiratory tract.
Ozone consists of ________ oxygen atom(s).
A) three B) zero C) one D) two E) four