The differential distribution of wing length in Drosophila, with larger wings in northern areas and
smaller wings in southern climates, provides evidence that:a.
chance is the most important agent in evolutionary change.
b. natural selection is the most important agent in evolutionary change.
c. wing length is not a heritable trait.
d. the fossil record is usually inaccurate.
e. the molecular clock cannot be applied to fruit fly traits.
B
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A genetic counselor will know that the probability of having a child affected with a condition inherited as an
autosomal recessive would be: a. 0.5 or 50% if both parents were homozygous normal. b. 0.5 or 50% if both parents were heterozygous. c. 0.25 or 25% if both parents were homozygous normal. d. 0.25 or 25% if both parents were heterozygous. e. 0% if both parents were heterozygous.
Salmonelloses are:
What will be an ideal response?
Refer to the paragraph on how caterpillar-damaged plants protect themselves by attracting parasitic wasps
To test the hypothesis that caterpillar saliva and a wound are both necessary to attract the parasitoid wasps you would need to include which of the following in your experiment? I) Slash the corn leaves with a razor blade. II) Put caterpillar saliva on a leaf wound. III) Put caterpillar saliva on an intact leaf. A) only I B) only II C) only III D) I, II, and III
Plate count agar is not a selective medium.
A) True B) False