Any substance that can cause an immune response is a/an:
A) microbe.
B) nonspecific defense.
C) antigen.
D) interferon.
E) antibody.
Answer: C
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What makes temperate rainforests different from their tropical counterparts?
a. winters are mild and wet and summers are cool b. winters are cold and summers are mild and wet c. they receive more rain d. they contain more species e. they differ only in latitude
Transplacental infection occurs when microbes from the mother enter fetal circulation through the umbilical artery
a. true b. false
Refer to the accompanying figure. The labeled structure that is responsible for secondary growth is:
a. outer bark b. inner bark c. wood d. bark e. vascular cambium
In which combination of locations would one who is searching for the gametophytes of "flower of stone" have the best chance of finding them?
1. moist soil 2. underground, nourished there by symbiotic fungi 3. south- or west-facing slopes 4. permanently shady places 5. far from any flower of stone sporophytes A) 1 only B) 1 and 2 C) 1, 2, and 4 D) 1, 2, and 5