Why do mountain streams have rocky bottoms?
A) Large amounts of snow reduce sediment erosion.
B) Cold temperatures reduce sediment accumulation
C) This is the result of a lack of sediment at high altitudes.
D) Steep gradients cause high velocity flows.
D
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Which of the following is not an activated monomer?
A) adenosine triphosphate B) glucose-6-phosphate C) aminoacyl tRNA D) amino acid E) uracil triphosphate
In some plants, flowering is a _____ response
a. phototropic c. photoperiodic b. gravitropic d. thigmotropic
Which of the following is a feature of plant cell division that distinguishes it from animal cell division?
A) formation of a cell plate B) formation of a cleavage furrow C) lack of cytokinesis D) production of four (rather than two) new cells per mitotic division
Restriction enzymes are obtained from ________.
A) archaea B) eukaryotes C) viruses D) bacteria