The desert population of spiny cacti are under attack. Peccaries are eating those plants with low-spine-number causing their alleles to vanish from the gene pool and enriching the remaining gene pool in those alleles that create cacti with high-spine-numbers. At the same time, a parasitic insect eats the cacti with a high spine number. The two extremes in spine number in the population are vanishing. Which kind of selection do we observe?
A. Directional selection.
B. Stabilizing selection.
C. Disruptive selection.
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