Which solution has the potential to diffuse the fastest?
a. A solution with large molecules as opposed to smaller ones.
b. A solution with a higher concentration of molecules as opposed to one with a lower concentration.
c. A solution that is under low pressure as opposed to one under high pressure.
d. A solution that is at a low temperature as opposed to one at a higher temperature.
e. A solution containing a hydrophilic solute as opposed to a salt.
ANSWER: b
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The same basic array of bones is modified to give rise to the wing of a bat and the fin of a porpoise. Such anatomical structures are called:
A. uniform. B. inherited. C. homologous. D. analogous. E. evolutionary modifications.
Which of the following would be considered to be a synapomorphy of conifers and flowering plants?
Given the following list of characteristics:
A. Chlorophylls a & b.
B. Vascular tissue.
C. Seeds.
D. Flowers.
E. Both chlofophyls a & b and vascular tissue.
The F plasmid
a. can exist as multiple copies integrated into the bacterial chromosome. b. encodes enzymes that assemble protein products of genes on the bacterial chromosome into pili. c. replicates independently from the bacterial chromosome when in episome form. d. must be present for a cell to initiate conjugation. e. is generally maintained as many copies in a single bacterial cell.
What removes nitrogen from the atmosphere?
a. denitrification b. nitrification c. mineralization d. nitrogen fixation e. assimilation