The term "plankton" ____
a. refers to a taxonomic division of algae
b. is a common term for microscopic organisms that drift or swim weakly in water
c. includes only multicellular forms
d. refers to small aquatic plants
e. would apply to large brown algae
ANSWER: b
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Antiviral drugs that target reverse transcriptase would be used to treat infections caused by ________.
A. herpes zoster virus B. HIV C. respiratory syncytial virus D. hepatitis C virus E. influenza A virus
Which of the following would be the first step in the biosynthesis of a virus with reverse transcriptase?
a. A complementary strand of RNA must be synthesized. b. Double-stranded RNA must be synthesized. c. A complementary strand of DNA must be synthesized from an RNA template. d. A complementary strand of DNA must be synthesized from a DNA template. e. none of the above
Most of the wood of a tree trunk consists of
A. vascular tissue. B. collenchyma tissue. C. sclerenchyma tissue. D. dermal tissue. E. parenchyma tissue.
Von Baer proposed that diagnostic traits for distinguishing species among vertebrates appear at the:
a. earliest stages of development. b. latest stages of development. c. earliest and latest stages of development. d. middle stages of development.