These molecules can directly convert extracellular signals into intracellular signals.
A. G proteins
B. membrane receptors
C. scaffolds
D. adapter proteins
E. second messengers
Answer: B
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In which type of population distribution would
plot sampling be most accurate?
a. clumping b. uniform c. random d. random and clumping e. uniform and clumping
We recognize three levels of biodiversity: genetic diversity, species diversity, and
__________diversity. Fill in the blank(s) with the appropriate word(s).
Giardia lamblia and Trichomonas vaginalis are commonly seen flagellates. Their life cycles include cyst and trophozoite forms. The infective form of Trichomonas vaginalis is a ______, thus this flagellate must be passed from person to person.
A) Cyst B) Trophozoite
Which of the following antimicrobial agents is the most toxic to humans?
A. 70% alcohol B. ethylene oxide C. quaternary ammonium compounds D. chloramines E. iodophors