Humans need light to see objects.

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Cats’ eyes are ..........

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............. is the period from sensing danger to being away from it.

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 The brain is part  of the .................................... system.

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Example/s of reflex action:

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Camouflage is an example of adaptation in which some animals hide from predators

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Humans can see objects that give off light or reflect light.

سؤال 7
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Nocturnal animals animals that have night vision to hunt at night

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..........is a type of messages that are transmitted so fast.

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........... is a desert rodent with very large ears (like the fennec fox) and small eyes.

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........... has a bowl-shaped face that can detect distant sounds and quiet movements.

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The bull shark can live in ................... 

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.......... have a sharp sense of hearing to hear all sound tones.

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The jerboa’s hopping in .......... paths

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Arctic fox lives in the hot desert.

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......... has the ability of heat sense through a special part in its face to locate its prey.

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The nervous system  sends information from...................

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........ are a tool used by humans, on which they can depend to see in the dark.

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Examples of light sources ...........

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...........is a way that helps the living organism to survive in its environment.

سؤال 20
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