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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They needed less food
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They needed less water
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It helped them run faster
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It regulated body temperature
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Detailed explanation-1: -Cold-blooded animals cannot generate their own body heat, but they do regulate it by changing their environment. Alligators and other reptiles often lie in the sun to warm themselves. On the other hand, they cool off by taking a dip in the water, moving into the sade of a rock or crawling into a burrow in the ground.
Detailed explanation-2: -This is because in warm-blooded animals, the heat they lose is proportional to the surface area of their bodies, while the heat they produce is proportional to their mass. This means that larger warm-blooded animals can generate more heat than they lose and they can keep their body temperatures stable more easily.
Detailed explanation-3: -Animals have a thick layer of fur over them. As the layer of fur blocks the cold air and prevents it from reaching the animal’s body, they will be protected against cold.
Detailed explanation-4: -Acclimatization-When the animals are exposed to certain climates for extended periods of time, physiological changes occur to help the individual adapt to hot or cold climates. This helps the body conserve energy.