When comparing the gene coding for cytochrome c in several species, it was noted that humans and
chimpanzees share the identical amino acid sequence with a change in only one location. This means
that
a. humans and chimpanzees can mate and produce viable offspring.
b. humans evolved from chimpanzees.
c. over time, chimpanzees will eventually evolve into primitive humans.
d. humans and chimpanzees are closely related in evolutionary time.
e. there is nothing particularly informative about this discovery.
D
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What form of photosynthesis evolved first on Earth?
A) oxygenic B) anoxygenic C) autotrophic D) heterotrophic
When a plant has a hypersensitive response, production of ____ triggers effects such as the expression
of PR proteins.
a. oligosaccharins b. salicylic acid c. ethylene d. cytokinin e. brassinosteroids
What would happen to immunoglobulin genes if alternative mRNA splicing was nonfunctional?
A. Transcripts would contain a single V region only. B. Transcripts would contain all possible V, D, J, and constant regions. C. Transcripts would have extra V, D, and J segments attached to a single constant region. D. Transcripts would have single V and D segments, but extra J segments and constant regions. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about mRNA splicing? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
If scorpion respiration rates were being estimated by measuring O2 uptake rather than CO2 production, the graph of O2 uptake versus time would
a. be similar to the graph of CO2 production versus time. b. be the exact inverse of the graph of CO2 production versus time. c. have a shape completely unrelated to the shape of the CO2 graph.