A red blood cell ____
a. does not possess a nucleus
b. is made in the plasma
c. can divide in the plasma
d. has the ability to repair itself
e. lives up to 120 months
ANSWER: a
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What is the fate of the two-celled pollen that
germinates on a receptive stigma?
a. one cell becomes a pollen tube; the other cell becomes two sperm cells b. one cell becomes a pollen tube; the other cell becomes a single sperm cell c. one cell dies and the other becomes a sperm cell d. both cells undergo mitosis to form four sperm cells e. both cells become sperm cells
In this generalized illustration of gametogenesis, the
four cells in the right column should be labeled a. sperm. b. eggs. c. ovum and three polar bodies. d. secondary spermatocytes. e. diploid.
Which one of the following statements is TRUE regarding photodynamic therapy?
A) It involves the use of light-sensitive drugs to target a cancer. B) It uses magnets to attract beads coated with a chemotherapeutic drug to a cancer. C) It is used for the treatment of cancers of the breast and ovary. D) It inhibits angiogenesis. E) It involves the use of antibodies to deliver treatments to a cancer.
The reacting molecules in an enzyme-catalyzed reaction are called ________.
Fill in the blank(s) with the appropriate word(s).