Gram staining divides bacteria into ____
groups based on differences in the composition
of their ____.
a. two; DNA
b. four; capsules
c. two; cell walls
d. four; cell walls
e. two; plasma membranes
C
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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
Which began first?
A. Multicellular life in the ocean B. Animals colonizing the land C. Multicellular life in fresh water D. Plants colonizing the land
Introns in pre-mRNA are known to:
a. code for specific protein domains. b. undergo excision, whereby they are spliced out of the message. c. be able to move within the mRNA, thereby giving rise to new exon combinations. d. protect pre mRNA from enzyme degradation. e. code for important amino acid sequences.
A dance that recruits other bees into foraging 90 degrees to the right of the sun is indicated by flying ____.
A. straight up the comb B. straight down the comb C. to the left of vertical D. to the right of vertical E. in circles