Thigmotropism is a growth response to
a. light.
b. day length.
c. contact with a solid object.
d. circadian rhythms.
e. gravity.
C
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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.
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.
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
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