question archive A species of snail (Tegula funebralis) common on California shores is found in two distinct populations that rarely interbreed: one from Southern California and one Northern California
A species of snail (Tegula funebralis) common on California shores is found in two distinct populations that rarely interbreed: one from Southern California and one Northern California
Subject:BiologyPrice: Bought3
A species of snail (Tegula funebralis) common on California shores is found in two distinct populations that rarely interbreed: one from Southern California and one Northern California. In Southern California, Tegula live high up on the shore. In Northern California, they live in deeper water. Predators that eat snails (octopi, starfish and crabs) are more abundant in Southern California than in Northern California. Northern Tegula An experiment was conducted: snails from northern and southern Southern Tagula populations were released in deep water. If predators were present, Predators all of the snails moved as quickly as possible to higher ground. (snails can probably sense chemicals released by predators) The results (see picture) were that southern snails moved faster to reach high ground than the northern snails. Because the northern snails were slower, they were more likely to be eaten by predators. In the space below, explain what this experiment suggests in terms of the evolution of these two populations of snail. Be complete and logical in your conclusions. Use terminology that you have learned during this unit of the course.
