Genes may be
a. turned on and off.
b. never turned on.
c. turned on and left on.
d. activated for only a short time in one cell and a long time in another cell.
e. all of these
E
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Algae in the genus Caulerpa typically grow to a length of over half a meter and have structures similar to stems, leaves, and roots. Reproduction occurs when adults produce sperm and eggs that fuse to form offspring. Algae in the genus Caulerpa typically grow to a length of over half a meter and have structures similar to stems, leaves, and roots. Reproduction occurs when adults produce sperm and
eggs that fuse to form offspring. Each adult Caulerpa consists of just a single cell, however. Which of the following statements is true? A) Caulerpa violate the pattern component of the cell theory that all organisms consist of cells. B) Caulerpa violate the process component of the cell theory that all cells come from preexisting cells. C) Caulerpa violate both the pattern and process components of the cell theory. D) The existence of Caulerpa is consistent with the cell theory.
Island populations are more vulnerable to
__________ than their mainland counterparts. a. storms b. disease c. droughts d. genetic drift e. all of these
How does Salmonella grow in host cells? How does it differ from Shigella?
What will be an ideal response?
The STD ________ causes an inflammation of the liver and is preventable by ________.
A. gonorrhea; vaccination B. syphilis; male condom C. HIV; vaccination D. hepatitis A; vaccination E. hepatitis B; using a male condom