adaptation of organisms to their environments special features which allow organisms to survive
TRANSCRIPT
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Adaptation of organisms to their environments
Special features which allow organisms to survive
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Arctic Fox what features allow it to survive in the arctic?
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Polar bears
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Cold environments
• Why are so many arctic animals large?
• List 3 ways arctic animals keep warm in winter
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Desert rat- how is it adapted to live in a desert?
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Surviving in dry climates
• Deserts are hot and dry
• What are the challenges for animals in deserts?
• Why is it important that desert animals keep cool without sweating?
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How are cactus adapted to survive in deserts?
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What adaptations do plants have to stop them being eaten?
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Competition• What do animals compete for?
• What do plants compete for?
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What makes a successful animal competitor
• An animal which avoids competition as much as possible- they eat food that no other animals do
• Animals which set up their own territory an area where they can feed and live
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Competition for light
• Small plants in woodlands grow and flower before the leaves on a tree grow so they get as much light as possible
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How do plants cope with competition?
• Root systems vary and some plants have shallow roots and some have deep roots to get water and nutrients from different parts of the soil
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Plants continued
• Plants may spread their seeds to avoid competition with seedlings
• Some seeds are so small that they are carried by air currents
• Mini explosions may spread seeds• Juicy berries may be eaten by animals and
tough seeds pass through the gut and are deposited with the waste
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Origin of life on earth
• We think the earth began 3-4 billion years ago
• What evidence is there to support this view?