The plant hormones known as ________ may have an evolutionary origin in the common ancestor to both plants and animals.
A. abscisic acids
B. oligosaccharides
C. auxins
D. cytokinins
E. brassinosteroids
Answer: E
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During chemical evolution, which of the following occurred in the molecules involved?
A) Entropy decreased while potential energy increased. B) Entropy increased while potential energy increased. C) Entropy stayed constant while potential energy increased.
Common megaplankton of the open ocean include all but
a. cnidarians. b. mollusks. c. gelatinous zooplankton. d. diatoms. e. salps.
In a DNA double helix, each loop of the helix
a. is wound around histone proteins. b. consists of 10 nucleotides. c. always contains equal amounts of G and T. d. contains the sugar-phosphate backbones in the interior of the helix. e. represents one nucleotide.
Which human protein do human skin fungal
pathogens typically digest?
a. collagen b. elastin c. myosin d. keratin e. pepsin