Rank the elements carbon, phosphorus, calcium, and iodine in order of decreasing number of valence electrons
A. CPCaI
B. ICaPC
C. IPCCa
Answer: C
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Which of the following occurs in vascular land plants but not charophytes (stoneworts)?
A) sporopollenin B) lignin C) chlorophyll a D) cellulose E) chlorophyll b
What function does the presence of alkaline components in pancreatic juice serve?
a. They create an optimum environment for digestion in the small intestine. b. They neutralize the acidity of stomach. c. They stimulate peristalsis in the small intestine. d. They create an optimum environment for digestion in the stomach. e. They stimulate peristalsis in the stomach.
The transfer of fluid from the glomerulus to Bowman's capsule _____
A) results from active transport B) transfers large molecules as easily as small ones C) is very selective as to which subprotein-sized molecules are transferred D) is mainly a consequence of blood pressure in the capillaries of the glomerulus
Which is the best explanation for why plant roots use active transport to import solutes?
A. transport proteins are not present. B. the cell wall prevents diffusion. C. the phospholipid bilayer is not formed. D. solute concentration is higher inside the cell. E. protein channels are closed.