A Negative sense RNA virus
A. is ready for immediate translation
B. must synthesize a negative RNA copy of its genome
C. must synthesize a positive RNA copy of its genome
D. is a special form of tRNA used by its virus
E. always codes for RNA polymerase
Ans: C. must synthesize a positive RNA copy of its genome
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The sunflower species Helianthus anomalus is thought to have been formed by hybridization between the sunflower species H. petiolaris and H. annuus because it contains a set of chromsomes from both parental species. H. anomalus is most likely an example of instantaneous speciation through
A. allopolyploidy. B. autopolyploidy. C. parthenogenesis. D. hybrid sterility. 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 speciation through polyploidy? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
Surface currents in the ocean typically
A) flow most strongly from west to east in equatorial regions. B) are colder on the western side of continents. C) flow counterclockwise in gyres in the Northern Hemisphere. D) flow unimpeded from east to west just north of Antarctica.
Cell signaling during much of C. elegans development occurs along concentration gradients. What kind of signaling does this represent?
What will be an ideal response?
Microbial molecules detected by phagocytes are called
A) TLRs. B) NODs. C) PAMPs. D) leukotrienes. E) prostaglandins.