Most animals show ____ symmetry
a. bilateral
b. multilateral
c. no
d. radial
e. unilateral
a
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Which of the following has to be a haploid cell?
a. a cell with 6 chromosomes b. a cell with 3 chromosomes c. a cell with 12 chromosomes d. a cell with 24 chromosomes
DNA and RNA are alike in
a. the pentose sugar. b. all the nitrogenous bases used to assemble the genetic code. c. the number of strands. d. their function in genetics. e. none of these.
Planes maintain an atmospheric pressure equivalent to about 8,000 feet to sustain ____
a. a stable temperature b. oxygen levels c. oxygen availability d. oxygen levels and availability e. oxygen availability and reduce buildup of carbon dioxide
The number of species of living organisms on the planet is probably closest to
A) 100,000. B) 1,000,000. C) 10,000,000. D) 100,000,000.