The shells of some marine snails are highly variable, with some snail shells being solid colors and others having stripes. predation by birds is a major source of mortality for the snails. scientists studying these snails found that while 47 percent of the snail population was striped, 56 percent of the snails eaten by birds were striped. what could scientists conclude about the snails?

The correct answer to this open question is the following.

Scientists can conclude that snails with shells have better adaptations opportunities and have less risk to be eaten by birds, that the striped snails. Scientists call this phenomenon "positive selection," a type of natural selection described for the first time by Charles Darwin in his important book "On the Origins of Species." The hard shell of snails helps them to adapt to the environment and to survive in comparison to the striped snails. In the natural evolution of the species, the tendency is that striped snails are going to be less and less with time.

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