You and your lab partner are observing a cell under a microscope, but you do not know whether it is a eukaryote or a prokaryote. Which of the following observations regarding the chromosomes would you use to immediately conclude that the cell is a
eukaryote?
A) The chromosomes are circular in structure.
B) The chromosomes are housed in a membrane-enclosed nucleus.
C) The chromosomes contain very few proteins.
D) The chromosomes are very simple in structure.
Answer: B
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Which of the following examples is most similar to the plan that conservationists have for restoring the Florida panther population?
A. Reintroduction of captive bred California condors B. Creation of African wildcat kittens using cloning C. Reintroduction of male prairie chickens from neighboring states D. Exchange of grizzly bears between neighboring populations E. Creation of European hedgerows between stands of forest
Campylobacter jejuni is transmitted to humans by all of the following EXCEPT
A. anal-oral sexual activity. B. insect vectors. C. contaminated food and water. D. infected animals.
How do terrestrial animals prevent toxic accumulation of ammonia in their tissues?
a. They use ammonia in other metabolic processes. b. They convert ammonia to less toxic forms. c. They vent ammonia across the body wall. d. They eliminate ammonia rather than excreting it. e. Animals do not produce ammonia
Which of the following would be LEAST likely to use the results of scientific research in his or her daily profession?
A. farmer B. doctor C. baseball player D. violin maker