Which pathway(s) is used to fix carbon dioxide?
A. Entner-Doudoroff
B. Reductive tricarboxylic pathway
C. Glycolysis
D. Pentose phosphate pathway
Answer: B
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The bones of the pectoral girdle are arranged ____
a. for weight bearing b. to minimize structural damage during movements c. to maximize movements d. to maximize stability e. to maximize organ protection
Which of the following distinguishes a mammal from a reptile?
a. Mammals may have hair whereas reptiles have feathers. b. Mammals suckle their young whereas reptiles do not. c. Mammals emerge from eggs whereas reptiles give live birth. d. Mammals evolved before reptiles. e. Mammals evolved from amphibians whereas reptiles evolved from dinosaurs.
Why do the cells of the digestive system secrete certain enzymes, such as pepsin, in their inactive forms?
What will be an ideal response?
What were the two different types of australopithecines?
A. erect, knuckle-walker B. hunting, gathering C. gracile, robust D. arboreal, terrestrial E. carnivorous, omnivorous