Exercise 4: Darwin\'s Theory by Natural Selection Which conditions will favor th

Question

Exercise 4: Darwin's Theory by Natural Selection Which conditions will favor the evolution of thicker shells? Select one or more: a. Snails with thinner shells are more likely to die from predation than snails with thicker she b. Shell thickness is heritable. c Individual snails change their shell thickness in response to the presence of crabs d Snails in the population all have the same shell thickness e. Crabs preter to eat snais with thicker shells e snails in the population have thick shells and so ype here to search 7

Explanation / Answer

The following conditions will favour the evolution of thicker shells.

a. Snails with thinner shells are more likely to die from predation than snails with thicker shells.

b. Shell thickness is heitable

c. Indiidual snails change their shell thickness in response to the presence of crabs.

The crabs exert selective pressure on crab population. they favour to eat snails with thinner shells.

Thicker shells of snails would have come by means of mutations.

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