Describe one experimental process used to manufacture a DNA vaccine for the SARS virus. What will be an ideal response?
ANSWER: To make the DNA vaccine, one of the virus’s genes is isolated using recombinant DNA
technology. The viral gene is injected into mice, where it directs the synthesis of a viral
protein. The mouse’s immune system responds by making antibodies against the protein,
which protects the mouse against future infections with the SARS virus
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Treponemal antibodies are those that are:
a. produced against antigens of the organ-isms themselves. b. produced by infected patients against components of mammalian cells. c. produced by the organism that causes the systemic destruction of the disease. d. also called reaginic antibodies.
Which hormone plays a central role in all aspects of plant development and is made mainly in shoot apical meristems and in young leaves?
a. abscisic acid b. gibberellin c. auxin d. cytokinin e. ethylene
If survival rates do not vary with age, as in many species of perennial plants, reptiles, adult birds, and rodents, survivorship curves are typically
A) type I. B) type II. C) type III. D) type IV.
During animal development, changes in cell position occur extensively during _____.
Fill in the blank(s) with the appropriate word(s).