Why do immunizations require two doses?
a. The first dose stimulates the effector cells
only, and the second dose stimulates the
memory cells only.
b. The first dose stimulates the primary
immune response, and the second dose
stimulates the secondary immune response.
c. In case the first dose isn't enough to induce
immunity, a second dose is given.
d. It is a way for doctors to make more
money.
e. Both c and d are correct
B
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A) 10 B) 25 C) 50 D) 100
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a. Golgi bodies b. vesicles c. rough endoplasmic reticula d. lysosomes e. smooth endoplasmic reticula
Theodore Diner was researching which of the
following plant diseases when he discovered the first viroid? Chapter 21 Viruses and Prokaryotes 3 a. potato spindle tuber disease b. tulip variegation c. tomato root rot d. chestnut blight e. all of the above
An insertion sequence is distinguishable from other mobile genetic elements because ________.
A. it encodes a transposase B. it is composed of DNA C. it is highly complex D. it is smallest