If two sister species on the phylogenetic tree above differ from the other two in a single character state (say dark or light fur), denote any possible evolutionary changes by placing an arrow—or arrows—on the tree below
Be sure to label the arrows as a loss or gain
What will be an ideal response?
ANS:
should show the single evolutionary event as in Figure 5.4 in the text
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The number of sperm cells that form from a primary spermatocyte is
A) 2. B) 4. C) 16. D) 100.
Which of the following is a type of essential nutrient?
A. Organic vitamins B. Essential amino acids C. Minerals D. All of the above are types of essential nutrients.
Some species of cuckoos lay their eggs in the nest of other birds, forcing the other bird to raise the young of the cuckoo. This would be a type of ________.
a) parasitism b) predation c) commensalism d) mutualism
Which of the following statements regarding the glycolysis pathway is FALSE?
A) Two pyruvate molecules are generated. B) Four ATP molecules are generated via substrate-level phosphorylation. C) Two NADH molecules are generated. D) One molecule of ATP is expended. E) Two molecules of water are generated.