The initial, brief period of early, general symptoms such as fatigue and muscle aches, is the
A. period of invasion.
B. prodromal stage.
C. convalescent stage.
D. incubation period.
E. All of these choices are correct.
Answer: B
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Transgenic mice are useful to human researchers because they _____
A) can be valuable animal models of human disease B) are essential for mapping human genes C) are now used in place of bacteria for cloning human genes D) were instrumental in pinpointing the location of the huntingtin gene
In order of their occurrence what are the steps in RNA interference?
A. Processing of RNA transcript by DGCR8, binding to RISC, transport to cytoplasm, processing by Dicer, binding to target mRNA B. Processing by Dicer, processing of RNA transcript by DGCR8, transport to cytoplasm, binding to RISC, binding to target mRNA C. Processing of RNA transcript by DGCR8, transport to cytoplasm, processing by Dicer, binding to RISC, binding to target mRNA D. Processing of RNA transcript by DGCR8, processing by Dicer, transport to cytoplasm, binding to RISC, binding to target mRNA
The experiments that clearly distinguished DNA and not protein as the hereditary material were conducted by _____.
A. Pauling B. Hershey and Chase C. Griffith D. Watson and Crick E. Avery
Which of the following clades has been proposed by plant biologists as the clade that defines the plant kingdom?
a. Plantae, Streptophyta, and Viridiplantae have all been proposed as the clade that defines the plant kingdom. b. Kingdom Plantae, which includes only the embryophyte clade c. Kingdom Streptophyta, which also includes the charophytes d. Kingdom Viridiplantae, which also includes all green algae (chlorophytes) e. Kingdom Vasculata, which includes the vascular plants