When species evolve in different directions from a common point, it is called ______________.
A. Convergent evolution
B. Divergent evolution
C. Mutation
D. Vicariance
E. Natural selection
B. Divergent evolution
Biology & Microbiology
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The first kind of leukocyte lured to the site of inflammation is the
A. neutrophil. B. monocyte. C. macrophage. D. basophil.
Biology & Microbiology
The human skeleton is a typical vertebrate
A. exoskeleton. B. hydrostatic skeleton. C. axial skeleton only. D. endoskeleton. E. appendicular skeleton only.
Biology & Microbiology
Which of these is a direct source of energy for muscle contraction?
a. ATP. b. glycogen. c. glucose. d. fatty acids.
Biology & Microbiology
The carbon atoms in organic compounds typically form ________ with other atoms
A) nonpolar covalent bonds B) polar covalent bonds C) ionic bonds D) hydrogen bonds E) either ionic or hydrogen bonds
Biology & Microbiology