Organic molecules with identical molecular formulas and that are structurally mirror images of each other are most specifically referred to as
A. polymers.
B. mimics.
C. enantiomers.
D. hydrocarbon rings.
E. saturated fatty acids.
C. enantiomers.
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Which statement best describes what ultimately happens to the chemical energy that is not converted to new biomass in the process of energy transfer between trophic levels in an ecosystem?
A) It is undigested and winds up in the feces and is not passed on to higher trophic levels. B) It is used by organisms to maintain their life processes through the reactions of cellular respiration. C) Heat produced by cellular respiration is used by heterotrophs for thermoregulation. D) It is eliminated as feces or is dissipated into space as heat, consistent with the second law of thermodynamics. E) It is recycled by decomposers to smaller and smaller forms until it finally breaks down to form soil.
Predict what would happen to the daughter cells if the G1 phase of the parent cell is shortened?
A. The cells would be smaller than normal. B. The cells would be missing chromosomes. C. The cells would not undergo cytokinesis. D. The cells would be larger than normal.
Identify the reaction shown in this diagram:
a. dehydration synthesis
b. condensation
c. hydrolysis
d. catalyst
According to this phylogeny, which of the following is true?
a. All chordates have a neural tube. c. Echinoderms have a neural tube. b. Amphioxus have a neural crest. d. All chordates have a neural crest.