Darwin explored the Galapagos Islands and observed variations of certain species. For example, he saw that the mockingbirds on three different islands were distinct but still similar to the mockingbirds found on the mainland. The level of diversity in an ecosystem can be determined by the frequency of speciation and extinction. Describe speciation and identify two possible prezygotic barriers of the mockingbirds that contribute to speciation. If the mockingbirds became extinct, explain how this could lead to adaptive radiation.

Fruit bats in central america eat bananas and other fruits. banana plants rely on bats for pollination. what would be the most likely consequence on the banana crop if fruit bats were eliminated from the area? the banana crop would increase because bats would stop eating the crops. the banana crop would decrease because bats would no longer pollinate the crops. the banana crop would remain constant because bees would replace the bats. the banana crop would remain constant because the plants would adapt using asexual reproduction.