Lateral roots arise from the ____
a. endodermis
b. root cap
c. quiescent center
d. pericycle
e. root hairs
ANSWER: d
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Epiphytes are
a. plants that are not parasites but that do grow on other plants instead of the soil. b. plants that trap animals and digest them. c. parasitic plants that use mycorrhizae to obtain nutrients and food indirectly from other plants. d. plants that deal with nutrient-deficient soil by growing a large, netlike mesh of roots through several layers of the soil. e. parasitic plants that use haustoria to obtain nutrients and food directly from other plants.
Which of the following is NOT a parasitic
roundworm infection of humans? a. trichinosis b. pinworm c. schistosomiasis d. hookworm e. elephantiasis
Some regions of a polypeptide may coil or fold back on themselves. This is called _____, and the coils or folds are held in place by _____.
A. secondary structure ... hydrogen bonds B. secondary structure ... peptide bonds C. tertiary structure ... hydrogen bonds D. primary structure ... covalent bonds E. tertiary structure ... covalent bonds
The infectious agent that causes AIDS is a
A) virus. B) bacterium. C) yeast. D) protozoan. E) mold.