Gehring tested the hypothesis that the Pax6 gene acts as a master regulator of eye development by introducing mouse Pax6 genes into Drosophila antennae. What happened, and did it support or refute his hypothesis?
A. A compound eye developed on the
antenna; this supports the hypothesis
B. A compound eye developed on the head;
this supports the hypothesis.
C. The antenna developed normally; this
falsified the hypothesis.
D. The antenna developed where the eye
normally would be; this supports the
hypothesis.
E. The antenna developed where the eye
would normally be; this falsified the
hypothesis.
A
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Which of the following is an assumption used in the molecular clock approach?
A) Nucleotide changes accumulate in a sequence in proportion to time. B) Nucleotide changes are generally NOT transferred to progeny. C) Nucleotide changes are NOT random. D) Nucleotide changes are subject to intense selective pressure.
After consolidation, long term memories are stored in the ____
a. cerebral cortex b. thalamus c. hippocampus d. amygdala e. cerebellum
During an experiment you are instructed to add sodium chloride, or table salt, to water and observe what happens. Based on the illustrations below, what process did you observe in this experiment?
A) The salt went through a chemical reaction and turned into sodium and chlorine gas. B) The salt evaporated out of the water solution. C) Water was the solute and the salt was the solvent, dissolving in the water. D) Water was the solvent and the salt was the solute, dissolving in the water.
All of the following are complementary nucleotide base pairs EXCEPT
A) C-G B) A-U C) T-A D) U-C