Human viruses can enter human cells by fusion with the cell membrane or by:
a. diffusion into the cell.
b. passage through specific protein channels.
c. coating themselves with lipids that cloak their entrance into the cell.
d. endocytosis.
e. hitchhiking onto protein signals entering the cell
D
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The extreme halophiles only survive in environments that are extremely high in:
a. acid b. heat c. hydrogen d. oxygen e. salt
Osteoporosis sometimes results from
a. excessive PTH secretion. b. insufficient PTH secretion. c. excessive intake of vitamin D. d. excessive intake of iodine. e. insufficient intake of vitamin D.
Bakers use which of the following organisms to make
dough rise a. Candida albicans. b. Lactobacillus acidophilus. c. Saccharomyces cerevisiae. d. Pseudomonas aeruginosa. e. Giardia lamblia.
Describe the value of using twins in the study of questions relating to the relative impact of heredity versus environment
What will be an ideal response?