________, a viral enzyme, is used to convert single-stranded RNA into ___________ for cloning.
Fill in the blank(s) with the appropriate word(s).
Reverse transcriptase; cDNA
Biology & Microbiology
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The fossil record indicates that the first vascular plants possessed roots
A. true B. false
Biology & Microbiology
Rank these plant types from those that undergo senescence soonest after seed germination to those that live longest.
Ranking Questions __ herbaceous perennial __ biennial __ annual __ woody perennial
Biology & Microbiology
Which one of the following would provide the most calories?
a. 2 grams of salt b. 3 grams of butter c. 4 grams of sugar d. 5 grams of hamburger
Biology & Microbiology
Parenchyma, collenchyma, and sclerenchyma are classified as tissues in the:a
dermal tissue system. b. vascular tissue system. c. ground tissue system. d. primary tissue system. e. secondary tissue system.
Biology & Microbiology