Inhabitants of oceanic islands resemble forms of the nearest mainland but show some differences. This is an example of
A. biogeography.
B. convergent evolution.
C. development.
D. the fossil record.
E. homology.
Answer: A
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Which of the following is NOT a characteristic of a type II restriction endonuclease?
A) cleavage product can be either blunt or sticky ended but is always the same for an individual enzyme B) recognizes a specific palindromic site for cleavage C) recognition site length varies among enzymes but is always the same for an individual enzyme D) unable to cleave methylated DNA
What branch of chemistry deals specifically with living systems?
A) organic chemistry B) inorganic chemistry C) biochemistry D) biological chemistry E) both choices C and D
Codominance occurs when
A) expression of two different alleles alternates from one generation to the next. B) both of the alleles in a heterozygote are equally expressed phenotypically in an individual. C) a heterozygote expresses an intermediate phenotype. D) offspring exhibit several different phenotypic expressions of a single trait.
What role do plasmodesmata play in plant cells?
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