The nervous system of vertebrates has how
many divisions?
a. 1
b. 2
c. 3
d. 4
e. variable, depending on the animal
B
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How do researchers in the metagenomics sector operate?
A) They study Mendelian traits in children. B) They link diseases by shared gene expression. C) They detect mutations in the protein encoding part of an individual's genome by using powerful algorithms. D) They collect and sequence DNA, then consult databases of known genomes to imagine what the organisms to which the DNA belongs might be like.
Assume that having three nostrils is inherited as a sex-linked trait on the Y chromosome. A man with three nostrils has a daughter who has a son with a man who has only two nostrils. What is the probability that the three-nostril man's grandson has three nostrils?
A. 25% B. 0% C. 100% D. 50%
The chief distinguishing characteristic of all mammals is the presence of
What will be an ideal response?
The colony count of a 10^-8 plate in a dilution series is 162. What is the bacterial count in the original sample?
What will be an ideal response?