Cnidarians do NOT have
a. tentacles equipped with nematocysts.
b. three germ layers.
c. radial symmetry.
d. a saclike gut.
e. medusa stages.
Answer: b
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Which of these five evolutionary forces is rare and usually not considered by population geneticists?
A. mutation B. selection C. non-random mating D. genetic drift E. immigration
At the end of the 2008-2009 influenza season, 100% of influenza A H3N2 and the novel 2009 influenza A H1N1 were resistant to:
a. adamantane. b. oseltamivir. c. Tamiflu. d. Relenza.
Annotation is a process done to find all genes that
A. code for protein. B. are active in any given cell type. C. encode any RNA or protein product. D. are linked on any one chromosome. E. exist in a species.
In the first experiment to test the pedometer hypothesis in Sahara desert ants, which results did the researchers obtain?
A. Ants with normal legs walked past the home nest, ants with stumps found the nest, ants with stilts were short of the nest B. Ants with stilts walked past the home nest, ants with normal legs found the nest, ants with stumps were short of the nest C. Ants with stumps walked past the home nest, ants with normal legs found the nest, ants with stilts were short of the nest D. None of the above