Gene families are created when
A. genes duplicate.
B. exons converge.
C. viral infections occur.
D. introns are not removed from the mRNA after transcription.
E. both exon convergence and intron splicing.
A. genes duplicate.
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One way to improve crop productivity is to modify flowering time. This can allow for multiple growing seasons in one year, and can also increase grain production because a smaller plant has lower resource needs. You are approached by an agricultural company that wants to create an early-flowering transgenic plant. Using your knowledge of Arabidopsis genetics, which genetic modifications would you suggest?
A. Inhibition of the embryonic flower ( EMF) gene or overexpression of the LEAFY (LFY) gene would work. B. Inhibition of the LEAFY (LFY) gene or overexpression of the embryonic flower (emf) gene would work. C. Inhibition of either the embryonic flower (emf) gene or the LEAFY (LFY) gene would work. D. Early flowering is not possible in Arabidopsis, and is not likely to be possible in other plants. 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 EMF and LEAFY genes? 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?
The embryonic germ layer of tissue in animals that develops into the muscles and reproductive system is the
A. ectoderm. B. protoderm. C. pachyderm. D. endoderm. E. mesoderm.
All of the following may have been in the atmosphere of primitive Earth EXCEPT
A. hydrogen. B. ammonia. C. water. D. oxygen.
The energy used to produce ATP in the light reactions of photosynthesis comes from __________.
Fill in the blank(s) with the appropriate word(s).