The human brain contains:
A) 100 to 150 billion circuits
B) 100 to 150 billion neurons
C) 100 to 150 million neurons
D) 100 to 150 million glial cells
Answer: B) 100 to 150 billion neurons
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Disulfide bonds are often found to stabilize which of the following levels of protein structure?
A) primary B) secondary C) tertiary D) all of the above E) none of the above
The population at right is being subjected to _____
1.directional selection
2.stabilizing selection
3.disruptive selection
4.selection against intermediate forms
Which of the following is true about the interrupted mating technique?
A) Donor will pass only beneficial genes to the recipient. B) Time of contact is not applicable to this protocol. C) The recipient bacterium will choose the best genes. D) Genes are transferred from the donor to recipient in a linear fashion based upon time of contact. E) Genes will be passed from the centromere.
Organisms that require high levels of sodium chloride in order to grow are called ________ organisms.
Fill in the blank(s) with the appropriate word(s).