The upper distribution of tropical intertidal nerites can be found in the ____ zone
a. brown.
b. white.
c. gray.
d. black.
e. yellow
C
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What is the primary disadvantage of being an osmoregulator?
A. Extra energy has to be used to pump ions into or out of the body. B. Extra energy has to be used to pump water into or out of the body. C. The central nervous system is deprived of critical information about the environment by keeping relatively constant internal conditions. D. Physiological systems do not typically perform well under relatively constant conditions.
______ cells are made during mitosis, but _______ cells are made during meiosis.
a. Somatic; diploid b. Haploid; gamete c. Somatic; haploid d. Haploid; diploid
Rosalind Franklin used which technique to
determine many of the physical characteristics of DNA? a. transformation b. transmission electron microscopy c. density-gradient centrifugation d. X-ray diffraction e. all of these
What is the frequency of the a allele in the butterfly population?
A) 0.16 B) 0.04 C) 0.40 D) 0.64 E) 0.40