Over long periods of time, living things have evolved, adapting to survive in different conditions. If an organism has an advantageous adaptation, they are more likely to survive, reproduce, and pass on the genetic information for this adaptation to the next generation. This idea, now known as the theory of evolution by natural selection, was defined by British scientist Charles Darwin.
Thick white fur to help keep the bear warm and for camouflage
Small ears to reduce heat loss
Thick layer of fat to help insulate for warmth
Large paws to stop the bear sinking in the snow
Sharp teeth to eat prey easily
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Nostrils are lined with hair and can shut to stop sand getting into the nose
Bushy eyelashes to stop sand getting in their eyes
Thick lips, so the camel can eat prickly desert plants
Hump(s) containing fat which the camel can use for energy, but the fat doesn’t insulate its body
Large feet to reduce the pressure the camel exerts on the sand
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Sharp teeth to rip up prey
Thick blubber (fat) for insulation in cold oceans
Streamlined shape and powerful tail to move the mammal very quickly through the water
Orcas are well camouflaged. When looking from the bottom of the water up, their white underbellies look like the surface of the water. When looking down from the top of the water, their black top sides blend in the with color of the depths.
Strong muscular tail to push the animal through the water