A group of prokaryotic genes that are controlled together is a(n)
A. proteome.
B. ribosome.
C. replication fork.
D. operon.
E. chromosome.
D. operon.
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How does "the pill" work to prevent pregnancy?
A) It is a barrier between the vagina and the cervix. B) It delivers progesterone leading the ovary to discontinue ovulating a new oocyte. C) It produces an acidic environment for sperm. D) It blocks the oviduct, preventing passage of eggs or sperm.
Explain the purpose of meiosis
What will be an ideal response?
In a resting person what percentage of blood pumped by the right ventricle enters the lungs?
a. 0 percent b. 10 percent c. 20 percent d. 50 percent e. 100 percent
Which of the following findings was essential for Edward Jenner's vaccination process?
A) Exposure to a milder disease form may produce immunity. B) A weakened microorganism will not cause disease. C) Someone who recovers from a disease will not acquire that disease again. D) Disease is caused by viruses. E) Pathogenic microorganisms infect all humans and animals in the same manner.