With cladistic analyses, characters of an organism exist in ____ form(s), referred to as ____
a. one; a character state
b. two; character states
c. two; variable traits
d. many; polymorphic states
e. many; variable traits
ANSWER: b
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The ____ regulates the movement of food into the stomach and the ____ regulates the passage of food into the small
intestine.
a. epiglottis; gastroesophageal sphincter b. epiglottis; pyloric sphincter c. gastroesophageal sphincter; epiglottis d. gastroesophageal sphincter; pyloric sphincter e. pyloric sphincter; anal sphincter
Which of the following viral components is
NOT typical of a plant virus?
a. RNA b. protein coat c. helical structure d. viral envelope e. more than one of these is NOT typical of a plant virus
Megakaryocytes
a. produce platelets by fragmentation. b. produce leukocytes. c. are wandering phagocytes. d. are disk-shaped cells that transport gases. e. produce antibodies.
Selective permeability of the cell membrane is controlled by
a. kinetic energy. b. lipids. c. proteins. d. lipids and proteins. e. electrolytes.