EVOLUTION
SOURCES OF VARIATION IN A POPULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A walking stick looks like the twig on which it rests.
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A porcupine’s quills cause a predator to seek another meal.
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A whale filters plankton and krill from the water in which it swims.
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A penguin is dark on top and white below to blend in with the water.
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Detailed explanation-1: -Behavior. Porcupines are normally shy and solitary creatures (meaning you are unlikely to find one near your house), but in winter they may den in small groups. They are active year-round, but are rarely seen because they are most active at night and prefer to hide high in a tree or in a den during the day.
Detailed explanation-2: -Camouflage, highly developed senses, warning signals, and different defensive weapons and behaviours are all used by prey animals for survival.
Detailed explanation-3: -Camouflage and special body coverings are two ways that animals protect themselves from other animals.
Detailed explanation-4: -There are three types of adaptations: structural, physiological, and behavioral. Structural adaptations are how the animal’s body functions or looks on the outside. Body parts (like feet and ears) and body coverings (like fur and scales) are structural adaptations.