EVOLUTION
DARWIN’S THEORY OF NATURAL SELECTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To look different from other species.
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To be able to eat the food readily available in the environment they lived in.
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To protect themselves against predators.
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To protect themselves against predators.
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Detailed explanation-1: -On the Galápagos, finches evolved based on different food sources-long, pointed beaks served well for snatching insects while broad, blunt beaks work best for cracking seeds and nuts.
Detailed explanation-2: -In other words, beaks changed as the birds developed different tastes for fruits, seeds, or insects picked from the ground or cacti. Long, pointed beaks made some of them more fit for picking seeds out of cactus fruits. Shorter, stouter beaks served best for eating seeds found on the ground.
Detailed explanation-3: -In particular, changes to the size and shape of the beaks have enabled the different species to specialise in different types of food: seeds, insects, cactus flowers and fruits or even bird blood. The Galápagos finches are a classic example of adaptive radiation.
Detailed explanation-4: -Birds that are a part of the same species have different characteristics to help them survive. The different shaped beaks picked up certain types of food better than others. This is the result in physical characteristics in the same species working to give the birds an advantage in their environment.