Bat wings, human forearms, elephant legs, and cat forelimbs are collectively referred to as _____
a. analogous structures
b. homologous structures
c. vestigial structures
d. homozygous structures
e. heterozygous structures
ANSWER: b
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If you are a human geneticist looking for an ideal population in which to map disease genes, which of the following characteristics would help the mapping study?
A) small family sizes with well-known genealogies B) a population where all members have the disease C) large family sizes with little known genealogies D) large family sizes with well-known genealogies
How do restriction enzymes work?
1.They recognize sticky ends and quickly restrict their binding. 2.They recognize and cut only specific sequences going backwards and forwards in the DNA. 3.They help to paste DNA from different organisms into cloning vectors. 4.They restrict plasmids from being taken up by host cells.
Synthetic ________, such as 2,4-D, are routinely used to control weeds and are applied in concentrations higher than would occur in the plant tissues.
A. ethylene B. auxins C. gibberellins D. cytokinins
Used to build complex organic compounds from simpler compounds; also known as biosynthetic reactions; chemical bonds are created; energy is required