Which of the following represents an early stage in primary succession?
A. Pine trees
B. Moss and lichens on bare rock
C. Weedy annual plants in an open field
D. Climax species in succession
E. Alder, cottonwood, and willow thickets
Answer: B
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Most reabsorption takes place across the walls of
a. papillary ducts. b. loops of Henle. c. proximal tubules. d. distal tubules. e. peritubular capillary.
A nuclear envelope has four of the following characteristics. Which is the exception?
a. single lipid bilayer b. continuous with endoplasmic reticulum c. possesses pores d. controls passage of substances into and out of nucleus e. separates DNA from cytoplasm
List several diseases caused by protozoa. Include the causal organism, the group in which it is
classified, and its means of transmission when possible. What will be an ideal response?
Compared to the air above a nearby land mass, how would the air above a large body of water be?
A) cooler in winter B) warmer in summer C) cooler in summer D) the same, unless wind is blowing