Living organisms are members of all of the levels listed; however, rocks are components of ________
A) the community
B) an organism
C) the population
D) the ecosystem
D
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Tissue culture techniques are used to
a. produce hundreds of identical plants. b. propagate promising mutant plants. c. improve food crops. d. increase production of commercially important hybrid plants. e. do all of these.
Sometimes the gene for blue eye color is in the same gamete as the gene for curly hair, but they are in different gametes just as often. Why?
A. crossing-over B. independent assortment C. fertilization D. segregation
A 30-year-old woman was hospitalized after she experienced convulsions. On examination, she was alert and oriented and complained of a fever, headache, and stiff neck. Which of the following is most likely to provide rapid identification of the cause of her symptoms?
A) Gram stain of cerebrospinal fluid B) Gram stain of throat culture C) biopsy of brain tissue D) check serum antibodies E) None of these would provide rapid identification.
For many decades scientist thought that proteins were the genetic material
a. true b. false