Who demonstrated that phage genetic material is DNA and not protein?
A. Chargaff
B. Franklin
C. Avery, MacLeod, and McCarty
D. Hershey and Chase
E. Watson and Crick
Answer: D
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The disease caused by an enveloped single-stranded RNA arbovirus of the flavivirus family is
A. AIDS. B. malaria. C. yellow fever. D. herpes.
Some chickens have a dominant frizzle gene that leads to the development of feathers that curl
outward rather than lying flat against their bodies as in standard chickens. Aside from these “frizzled feathers,” chickens with this dominant allele also tend to have higher metabolic rates and produce fewer eggs than chickens that carry the recessive version of this gene. Thus, this gene exhibits __________.
a. pleiotropy b. polygenic inheritance c. incomplete dominance d. codominance
The principal structural components of cilia and flagella are
a. actin microfilaments. b. myosin microfilaments. c. intermediate filaments. d. microtubules. e. collagen fibers.
Conservation biology includes
a. a survey of biological diversity. b. a look at the evolutionary origins of diversity. c. ecological considerations of diversity. d. an effort to maintain biodiversity. e. all of these.