The virulence factor of Vibrio cholera, which is primarily responsible for the signs and symptoms of cholera, is
A) the presence of polar flagella.
B) its ability to survive in freshwater.
C) its ability to form biofilms in saltwater.
D) its activation of certain genes within the human body.
E) its ability to produce a potent exotoxin.
E
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The total variation in a trait is known as the ________
A) phenotypic variation B) genetic variation C) environmental variation D) broad-sense heritability E) narrow-sense heritability
_______ diabetes mellitus primarily is an autoimmune disease.
Fill in the blank(s) with the appropriate word(s).
Genomics
What will be an ideal response?
Why were the first RNA replication experiments insufficient support for the RNA world hypothesis?
a. The experiments did not demonstrate natural selection. b. RNA could not adapt to environmental challenges. c. The RNA produced was not self-replicating. d. No mutations occurred in the RNA. e. Mutations occurred but they were not heritable.