Nondisjunction during mitosis leads to:
a. an individual with a clone of abnormal cells.
b. an individual with all abnormal cells.
c. death of the daughter cells.
d. nonviable sperm.
e. normal daughter cells.
A
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Which of the following represents what Darwin thought of natural selection?
a. He reasoned that if characteristics that better enable organisms to adapt to specific environmental pressures exist, then selective breeding could do the same. b. He reasoned that if a person could select different characteristics when breeding organisms, then nature could do so as well. c. Humans were selecting the characteristics they wanted in the offspring by choosing parents with those traits. d. Humans were selecting the characteristics they wanted in the offspring by eliminating indiv
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Figure 35.5
What type of skeleton is found in an earthworm, as illustrated in the accompanying figure?
A. Cartilaginous B. Bone C. Hydrostatic D. Chitinous E. Exoskeleton
Certain molecules (called glycoproteins) are on the outer surface of the plasma membrane. They have the function of ________
Fill in the blank(s) with correct word
Adhesive pili, exotoxins, and capsules are all microbial factors that help them establish infection. These are examples of
A. pathogenicity factors. B. infectivity factors. C. exogenous factors. D. virulence factors.