It is difficult being on a vegetarian diet because
A. vegetables are more expensive than meats.
B. no one can survive long periods without eating meats.
C. there is no way to obtain all necessary nutrients by only eating plants.
D. you have to be sure that you eat the proper combination of plant foods in order to obtain all the essential amino acids.
D. you have to be sure that you eat the proper combination of plant foods in order to obtain all the essential amino acids.
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Microfilaments grow longer:
A. more quickly at one end than the other. B. by growing outward from the centrosome. C. in cycles, following rapid depolymerization. D. if free tubulin dimers are available. E. All of these choices are correct.
Which group has six legs and two antennae?
a. crustaceans c. spiders b. insects d. horseshoe crabs
Which of the following Campylobacter spp. may cause a sexual-transmitted-like disease in cattle?
A. Campylobacter rectus B. Campylobacter coli C. Campylobacter fetus subsp. venerealis D. Campylobacter jejuni E. Campylobacter fetus subsp. fetus
During which step of water purification does water moves through sand beds and activated charcoal?
A) Storage B) Filtration C) Chlorination D) Sedimentation E) Aeration and settling