Which Three Factors Were Necessary for Natural Selection to Occur

question 4

Multiple Choice

Which three factors were necessary for natural selection to occur among the finches on Daphne Major in the Grants' study?

• A) The birds reproduced easily, the climate was constant, and the study went on for a long time.
• B) The bird beak lengths varied, beak length was a heritable trait, and the drought limited the food supply so there was competition for food.
• C) The bigger beaked birds survived the drought better, small beaked birds could produce big beaked offspring, there was plenty of food available.
• D) There was a drought that limited food, the birds were adaptable, the study went on for a long time.
• E) Finches reproduce quickly, finches can eat any kind of seed, the climate stayed mostly constant.

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