A vertebrate paleontologist is hunting through chalk deposits and finds a set of fused clavicles with some other bone fragments. What has she found?
A. The remains of an amphibian.
B. The remains of a mammal.
C. The remains of a lobe-finned fish.
D. The remains of a bird.
Answer: D
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The method of nucleotide sequence determination that utilizes dideoxynucleotides was developed by ________.
Fill in the blank(s) with the appropriate word(s).
Balanced polymorphism explains why carriers of cystic fibrosis are relatively resistant to
A) malaria. B) tuberculosis. C) diarrheal illness. D) pneumonia.
Which of the following is true of purines?
A) Cytosine is a purine. B) Adenine's bonding to thymine is stronger than is guanine's to cytosine. C) Purines have a double-ringed structure. D) Both adenine and thymine are purines. E) Purines bind readily to deoxyribose but not to ribose.
How can deforestation increase global warming?
A) It can decrease the total amount of photosynthesis as C3 plants are harvested. B) It can increase the number of C4 plants, thereby increasing photorespiration. C) It can cause runoff to become more acidic, thereby blocking the uptake of carbon dioxide. D) It can increase the uptake of carbon dioxide by encouraging the growth of faster growing plants.