Thigmotropism is a growth response to

a. light.
b. day length.
c. contact with a solid object.
d. circadian rhythms.
e. gravity.


C

Biology & Microbiology

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A recipient cell that is temporarily diploid for a portion of the genome during the replacement process is called a(n) ________.

A. exogenote B. merozygote C. endogenote D. None of the choices are correct.

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Viruses are composed of only

a. proteins. b. carbohydrates and proteins. c. proteins and nucleic acids. d. nucleic acids. e. carbohydrates, proteins, lipids, and nucleic acids.

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A normally harmless substance that produces an immune response in some people is a(n):

a. pathogen b. cytokine c. histamine d. allergen e. antibody

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Which of the following statements is false regarding why some scientists believe that the term "prokaryote" is a somewhat artificial designation?

A. Many bacteria have cytoskeletal elements B. Some bacteria have internal membranous structures C. Some bacteria have their genetic material enclosed within a membrane D. Some bacteria have 80S ribosomes

Biology & Microbiology