Which two approaches to identification of bacteria are least dependent on the ability to grow the microorganism in culture? (Check two.)
a. genetic approach
b. phenotypic approach
c. immunologic approach
d. physiologic approach
Ans:
a. genetic approach
c. immunologic approach
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Select the reasons why adaptive radiations are often observed on remote volcanic islands. Check all that apply.
_____ When a new volcanic island forms, there are many empty niches. _____ Only a few individuals reach remote islands. _____ Remote islands have more plant diversity than the mainland does. _____ Evolution is intrinsically faster on islands than on the mainland.
Supercoiling of double-stranded DNA is called its ______________ structure
A. primary B. secondary C. tertiary D. quaternary E. duplex
Which of the following is the smallest unit in terms of size?
A. quadriceps B. myofibril C. muscle fiber D. sarcomere E. myofilaments
Changes in chromosome number are usually the result of
a. genetic displacement. b. trisomy. c. crossing over. d. nondisjunction. e. disjunction.