Flagellated protozoans possess a layer of
elastic proteins just beneath the plasma
membrane called the
a. pellicle.
b. cilium.
c. capsule.
d. pillus.
e. flagellum
A
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Why does ice float in liquid water?
A) The high surface tension of liquid water keeps the ice on top. B) The ionic bonds between the molecules in ice prevent the ice from sinking. C) Ice always has air bubbles that keep it afloat. D) Stable hydrogen bonds keep water molecules of ice farther apart than water molecules of liquid water. E) The crystalline lattice of ice causes it to be denser than liquid water.
Which of the following statements about the female sexual cycle is FALSE?
a) It is controlled primarily by a spinal cord reflex b) The parasympathetic nervous system causes lubrication of the vagina c) The sympathetic nervous system causes vasodilatation of the vagina and clitoris d) Both a and b are false e) Both b and c are false
Mary Mallon, aka Typhoid Mary, was which type of carrier?
A) asymptomatic B) passive C) transient D) zoonotic
Suppose you have two departments and have daily data on complaints and number of products they oversee for the departments over two years. In the second year, you increased the number of products under the scope of department #2 by 10. To estimate the effect of this increase in the number of products, you estimate the following regression: Complaintsit = ? + ?1 × Department #2it + ?2 × Year2it + ?3 × Department #2it × Year2it + Uit. Which coefficient controls for non-time varying effects that make department #1 have more complaints than department #2?
A. ?3 B. ?1 C. ?2 D. ? + ?3