If many genes from two species differ in about 5% of their bases and substitutions occur at an estimated rate of 5% per 1 million years, then about million years have passed since the two species diverged.
A. 10
B. 1
C. 50
D. 5
E. 20
B. 1
Biology & Microbiology
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Life-threatening aneurisms are most likely to occur in
A) veins. B) venules. C) capillaries. D) arterioles. E) arteries.
Biology & Microbiology
In transduction, two prokaryotic cells of different mating types come together and genetic material is
transferred from one cell to another. Indicate whether the statement is true or false.
Biology & Microbiology
Which term refers to animals that have a fluid-filled cavity that separates the gut from the muscles of the body wall and which is completely lined by the peritoneum?
a. coelomate b. pseudocoelomate c. indeterminate d. mesenteries
Biology & Microbiology
In eukaryotic DNA methylation, methyl groups are usually added to which molecule?
A. Guanine B. Thymine C. Adenine D. Cytosine E. Deoxyribose
Biology & Microbiology