Which of the following events must occur before fertilization can happen?
A. double meiosis
B. mitosis
C. haploidization
D. pollination
E. carpellization
D. pollination
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Which adaptation(s) allow(s) a rattlesnake to locate prey more effectively?
a. acute sense of hearing only b. heat and chemical sensors c. acute sense of smell only d. acute sense of vision and chemical sensors e. acute sense of smell and vision
Four of the five animals listed below can harbor E. coli 0157:H7 without becoming ill. Select the exception
a. goats b. cattle c. deer d. sheep e. humans
Which of the following BEST describes an epitope?
a. the antigen binding site of an antibody molecule b. found only in IgG and IgM c. part of an antigen that stimulates production of, and binds to, a specific antibody d. too small to stimulate an immune response e. a complement protein that initiates lysis of target cells
The ______ period is sometimes referred to as the age of fish
a. cambrian b. permian c. devonian d. ediacaran e. cretaceous