Answer to Question #288084 in Evolution for haleigh

Question

a) Based on the class consensus model of natural selection what will happen to the

snail popluation over 20 generations on the island, assuming the conditions on the

island do not change?

To demonstrate your answer create a representation that shows what happens to the

banded and unbanded snails in the current population, at the first generation, at the

10th generation and the 20th generatio

Answer 1

Banding patterns of snails is an adaptation to camouflage to protect them from predators and harsh weather conditions.

The proportion of unbanded snails is higher in exposed habitat than in the thickets over the years. Banded snails were higher on shrubby shady habitats over the years.

Over the years, the long term average frequency of unbanded snails was higher in open habitat compared to in the thicket.

Over the years, higher proportion of unbanded snails were associated with hotter, sunnier summers.