Eric Kandel, who received a Nobel Prize for his discoveries in signal transduction pathways involved in memory,
performed experiments on ____.
a. Pacific sea hares
b. sea anemones
c. sea stars
d. flatworms
e. Drosophila
ANSWER: a
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Geneticists construct linkage maps of chromosomes by
A) correlating a phenotype to an observable chromosomal abnormality. B) determining the number of crossovers between genes on different chromosomes. C) calculating the percent recombination between two genes on the same chromosome. D) observing the number of genes on a chromosome.
Male gamete having a haploid number of chromosomes and the ability to fertilize an egg, the female gamete.
What will be an ideal response?
Gene duplications in Bacillus subtilis have resulted in a large gene family that encodes ________ transporters.
What will be an ideal response?
The signs and symptoms of infection with Helicobacter pylori are the result of
A. damage to the lining of blood vessels by H. pylori. B. invasion by H. pylori into the mucosa of the large intestine. C. invasion by H. pylori into the mucosa of the stomach. D. the production of exotoxins by H. pylori in the intestines. E. the production of toxins by H. pylori in contaminated food.