A carbon atom with six protons, seven neutrons, and six electrons has a mass number of ____
a. 6
b. 7
c. 12
d. 13
e. 19
ANSWER: d
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Consider a living plant cell in a living leaf that is not wilted. The pressure potential (?P) of such a cell ____ than that
in the fluids surrounding the cell.
a. is typically lower b. varies widely from higher to lower c. is typically higher d. is typically about the same as e. is typically less negative
The growth of a new plant on the margin of a leaf that eventually falls to the ground and grows
independently is an example of
a. fragmentation. b. protoplast fusion. c. somaclonal section. d. grafting. e. apomixis.
The similarity between the bodies of sharks and dolphins is an example of convergent evolution. Indicate whether the statement is true or false
Which of the following statements is not true?
a. Archaea and bacteria have different membrane lipids. b. Both archaea and bacteria generally lack membraneenclosed organelles. c. The cell walls of archaea lack peptidoglycan. d. Only bacteria have histones associated with DNA. e. Only some archaea use CO2 to oxidize H2 releasing methane