The ____ are the most diverse animal group.
A. vertebrates
B. insects
C. humans
D. protozoans
E. mollusks
Answer: B
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Weight gain and obesity may be partly caused by certain gut microbial communities that
A) absorb more vitamins and essential amino acids. B) produce more volatile fatty acids by fermentation. C) stimulate the gut endothelium to absorb more sugars. D) produce more hydrogen gas by fermentation.
Legume plants provide certain amino acids to the ________ so that they do not need to assimilate ________. In return, the bacteroids shuttle amino acids bearing the fixed nitrogen back to the plant.
A. bacteroids; ammonia B. bacteroids; nitrogen C. bacteroids; phosphorus D. root hairs; nitrogen
A diet high in ________ will cause the kidneys to overwork in an attempt to eliminate the excess ________
a. protein, urea b. carbohydrates, ammonia c. fats, urea d. fats, ammonia e. protein, ammonia
Which protist group does not have flagellated cells?
a. water molds b. brown algae c. golden algae d. euglenoids e. red algae