Energy flows in which pattern?
a. Sun ? environment ? consumers ? producers
b. Sun ? environment ? producers ? consumers
c. Sun ? consumers ? producers ? environment
d. Sun ? producers ? consumers ? environment
e. Sun? producers ? environment ? consumers
ANSWER: d
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A mechanism shared by both extracellular and intracellular digestion is
A. the ability to phagocytose food particles. B. a slow speed of digestion. C. the presence of a digestive cavity. D. the ability to consume both large and small food items.
Siamese cats have enzymes that code for dark
fur color but are only active in cooler temperatures. Thus, the tips of a Siamese cat’s ears, feet, and tail are dark but not the warmer regions of its body core. This is an example of
a. pleiotropy. b. environmental effects. c. epistasis. d. incomplete dominance. e. co-dominance
A chemist working in a pharmaceutical lab synthesized a new drug as a racemic mixture. Why is it important that she separate the two enantiomers and test each for its biological activity?
What will be an ideal response?
In trying to determine whether DNA or protein was the genetic material, Hershey and Chase made use of which of the following facts about these two types of molecules?
A. DNA contains phosphorus, whereas protein does not. B. DNA contains nitrogen, whereas protein does not. C. DNA contains sulfur, whereas protein does not. D. DNA contains purines, whereas protein includes pyrimidines.