Which of the following statements concerning
fertilization in ferns is true?
a. It occurs outside the egg-producing
structure.
b. It requires water.
c. The fertilization product is haploid.
d. A spore is the product of fertilization.
e. None of these are true.
B
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All EXCEPT which of the following are
monocots? a. orchids b. wheat c. maple d. grass e. palms
Benign Vibrio cholerae becomes pathogenic by all of the following steps except
A. the cholera toxin gene is incorporated into the benign Vibrio cholerae chromosome. B. a bacteriophage introduces a gene coding for the cholera toxin. C. the cholera toxin gene is translated. D. the benign host is transformed into a disease-causing agent by the toxin. E. a bacteriophage binds only to benign Vibrio cholerae without pili.
A person with a normal total cholesterol level:
A) is at high risk for an acute cardiac event if his or her HDL levels are elevated. B) will probably not develop coronary artery disease, even if his or her HDL levels are low. C) will likely not experience an acute cardiac event, even if his or her LDL levels are elevated. D) is still at risk for coronary artery disease if his or her LDL levels are elevated.
Brucellosis is
A) All of these choices are correct B) A zoonosis C) Associated with pathogen in the blood. D) Seen in the patient as a fluctuating fever, with headache, muscle pain, and weakness. E) An occupational illness of people that work with animals.