A diet that does not contain any dark green vegetables, whole grains, yeast, or legumes may result in a ____
deficiency.
a. vitamin B1
b. vitamin B2
c. vitamin B6
d. folic acid
e. niacin
ANSWER: d
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Is the regulation of blood sugar levels in the body a negative feedback loop or a positive feedback loop?
A. negative feedback loop B. positive feedback loop
The person who first used the term cell was
a. Darwin. b. Leeuwenhoek. c. Hooke. d. Watson.
Which of the following groups is suspected of causing climate change?
A. fossil fuel and hydropower usage B. erosion, deforestation, pollution, and desertification C. overfishing and hydropower usage D. ocean acidification and desertification E. fossil fuel usage, deforestation, and agriculture
Of the items listed, which is the smallest that you can see with the unaided eye?
A) Frog embryo B) Ribosomes C) DNA molecule D) Human skin cell E) Virus