Which of the following is NOT true concerning the
spirochetes?
a. Some live inside a host organism.
b. Some form endospores that germinate in
wounds.
c. All are free-living.
d. Some are pathogens carried by vectors.
e. Some cause Lyme disease.
Answer: b
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Many male birds will expend a great deal of
energy building nests. Females will mate with the males who build the best nests. This is best described as an example of
a. natural selection. b. sexual selection. c. runaway selection. d. the Red Queen effect. e. disruptive selection
Approximately, what percent of flowering
plants have animal pollinators?
a. 50 b. 60 c. 70 d. 80 e. 90
Sieve-tube members are connected by
A. sieve plates. B. tracheids. C. companion cells. D. tight junctions.
Which of the following cell cycles is represented by ferns and other plants?
A) Haploid life cycle B) Alternation of generations C) Diploid life cycle