Which of the following is not a similarity between humans and apes?
A. opposable big toe
B. powerful and precise grip
C. reduced reproductive rate
D. three different types of cone cells
E. smaller portion of the brain devoted to smell
Answer: A
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Which of the following statements support the hypothesis that the onset of puberty is related to nutritional state?
I) On average, puberty occurs at a younger age now than it did 200 years ago. II) Girls with large fat stores generally enter puberty earlier than thin girls do. III) The nutritional state of the U.S. population is much better than it was 200 years ago. A) only I and III B) only II and III C) only I and II D) only II E) I, II, and III
A plant physiologist treats a leaf with abscisic acid and observes that the stomata close. What happened inside the guard cells during the experiment?
A. Abscisic acid influences the movement of sodium ions out of the guard cells. B. Abscisic acid influences the movement of potassium ions out of the guard cells. C. Abscisic acid binds carbon dioxide and causes carbonate crystals to block the stomatal opening. D. Abscisic acid binds with auxins and induces water molecules to exit the guard cells. E. Abscisic acid causes the guard cells to become more turgid.
The Citric acid cycle occurs in the mitochondria. There are nine biochemical reactions involved in the Citric acid cycle, and they are highly ordered. Select the correct order. (Note: These are abbreviated and do not show NAD, ADP, ATP, or FAD.)
A. acetyl-CoA joins the Citric acid cycle and unites with oxaloacetate ?forming citrate ?which forms alpha-ketoglutarate ? which forms succinyl-CoA ? which forms succinate ? which forms fumarate ? which forms malate ? which forms oxaloacetate B. acetyl-CoA joins the Citric acid cycle and unites with oxaloacetate ?forming citrate ?which forms alpha-ketoglutarate ? which forms succinyl-CoA ? which forms succinate ? which forms malate ? which forms fumarate ? which forms oxaloacetate C. acetyl-CoA joins the Citric acid cycle and unites with oxaloacetate ?which forms alpha-ketoglutarate ? forming citrate ? which forms succinyl-CoA ? which forms succinate ? which forms fumarate ? which forms malate ? which forms oxaloacetate D. acetyl-CoA joins the Citric acid cycle and unites with oxaloacetate ?forming citrate ?which forms beta-ketoglutarate ? which forms succinyl-CoA ? which forms succinate ? which forms fumarate ? which forms malate ? which forms oxaloacetate
In black widow spider mating, the male _____________________ and the female _____________________.
a. breaks off his sexual organ inside the female; kills and eats the male b. produces a copulatory plug; removes the copulatory plug c. mates with many females; mates with only one male d. is larger; is smaller e. brings the female a nuptial gift of food; decides whether to accept it