Breeds of dogs, such as German Shepherds and Saint Bernards, occur as a result of:
a. polyploidy.
b. artificial selection.
c. hormones.
d. mutation.
e. natural selection.
B
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Recent studies on the evolutionary divergence of seed plants from seedless vascular plants used the genome of a ____,
a lycophyte, as a comparison for genomes of the more derived land plants.
a. numerous, large apical cells on the edges of their fronds b. single, large apical cell on the tip of their fronds c. single, large apical cell at the tip of their apical meristems d. numerous, small apical cells at the base of their apical meristems e. single, small apical cell at the base of their apical meristems
What type of mutagen would you use if you wanted to study the effect of pyrimidine dimers in causing cancer?
What will be an ideal response?
When food distends the stomach, the hormone __________ is produced, which stimulates the gastric
glands. a. secretin b. gastrin c. cholecystokinin d. gastric inhibitory peptide e. lipoprotein lipase
Plankton are floating communities of helminths.
Answer the following statement true (T) or false (F)