A person with antigen A on their red blood cells can give blood to someone with blood type(s)
a. A and AB
b. B and AB
c. only AB
d. only O
Ans: a. A and AB
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When the longitudinal muscles within an earthworm segment contract, what effect does this have on the shape of the segment?
A. The segment will shorten and widen. B. The segment will elongate and widen. C. The segment will shorten and become narrower in diameter. D. The segment will elongate and become narrower in diameter. E. The segment will change length, but not diameter.
Biodiversity increases the consumptive value of land, meaning that
A) ecosystems with low biodiversity consume resources at a higher rate than those with higher biodiversity B) land with lower biodiversity has many more possible uses for human than land with higher biodiversity C) more value can be derived from the more diverse products produced by ecosystems with high biodiversity relative to land that has been cleared for agriculture D) ecosystems with higher biodiversity consume more resources than those with lower biodiversity, creating more strain on the environment E) land that has been cleared for agriculture consumes natural resources at a slower rate and is cheaper to maintain
You are performing an experiment to assay phosphorylation of a substrate by a protein kinase. Based on the data in the table below, what do these experimental results suggest? SubstrateProtein kinaseGTPPhosphorylation detectedTest sample+++yesControl #1-++noControl #2+-+yesControl #3++-no
A. GTP is not required for phosphorylation. B. The substrate can undergo autophosphorylation. C. The protein kinase is required for phosphorylation. D. The substrate is not required for phosphorylation.
Within one or two weeks after infection with Plasmodium, ruptured liver cells release _____ and cellular debris into the host's bloodstream, causing fever and weakness characteristic of malaria.
A. Sporozoites B. Merozoites C. Anopheles mosquitoes D. Gametocytes E. Zygotes