The vertebral arches surround and protect the
A) vertebrae.
B) ribs.
C) cranial nerves.
D) spinal cord.
E) spinal nerves.
D) spinal cord.
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The following F1 cross is made: BBGg × Bbgg. Which is not a possible outcome in the F2 generation?
A. BBGg B. BbGg C. BbGG D. BBgg
When does recombination of genes, as a result of crossing over, occur during the cell cycle?
a. prophase I b. prophase II c. metaphase I d. metaphase II
In the laboratory, fruit flies (Drosophila) were artificially selected for the number of bristles on their bodies. One population (R) was selected for low numbers of bristles, a second population (S) for high numbers of bristles.After 35 generations (about 1 year's time), the two populations R and S were studied. Researchers found
A. a huge increase in S, a huge decrease in R, with no overlap whatsoever. B. a vast, overlapping range of bristle numbers was seen. C. a slight increase in bristles in S, a slight decrease in R, with a little overlap in the middle ranges. D. no change was seen; it's much too soon. E. some slight increase of bristle numbers was already evident.
Fermentation is evident by what color?
What will be an ideal response?