Which of the following analogies best illustrates the answer to the following: If sugars contain energy, why do we have to break apart sugars to release energy in order to make the high energy chemical called ATP?
a. electrons of matter
b. photons of light
c. letters in the word
d. books in the library
Ans: d. books in the library
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A natural predator of the crown-of-thorns sea star is a mollusc called the Giant Triton, Charonia tritonis. If the triton uses a radula to saw into the sea star, then to which clade should the triton belong?
A) chitons B) bivalves C) gastropods D) cephalopods
Which of the following descriptions best represents the gradual model of speciation?
A) Speciation occurs regularly as a result of the accumulation of many small changes. B) An isolated population differentiates quickly from its parent stock as it adapts to its local environment. C) Speciation occurs under unusual circumstances and therefore transitional fossils are hard to find. D) Species undergo little change over long periods interrupted only by short periods of rapid change.
Genes organized into an operon are beneficial to certain bacteria because the operon allows for
A. coordinated regulation of a group of proteins involved in numerous cellular activities. B. coordinated regulation of a group of genes that encode proteins with different functions. C. coordinated regulation of a group of genes that encode proteins with a common function. D. separate regulation of individual genes that encode proteins with different functions. E. differential regulation of individual genes that encode proteins with a common function.
Taste buds detect
a. light. b. atmospheric sound waves. c. chemicals in food and drink. d. movements of the head.