Beriberi is a deficiency disease related to which of
the following vitamins?
a. A
b. B1 (thiamine)
c. C (ascorbic acid)
d. B2 (riboflavin)
e. niacinv
Answer: b
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Fossils show that leaves most likely evolved from:
A. algal cells. B. endosymbiotic cyanobacterium. C. vascular tissue. D. photosynthetic stems. E. lateral meristems.
In MacArthur and Wilson's island biogeography model, species richness is a balance between
A. arrival and extinction. B. inhibition and facilitation. C. arrival and speciation. D. tolerance and inhibition. E. None of these choices are correct.
Which of the following organs is not found in the abdominal cavity?
a. Pancreas b. Large intestine c. Liver d. Stomach e. Bladder
A mutualistic symbiosis where fungal hyphae penetrate plant root cells is called a(n) ____
a. ectomycorrhiza b. lichen c. arbuscule d. endomycorrhiza e. haustorium