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Giraffes have long necks because the males use their long necks and reinforced bony skulls...

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Biology

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Giraffes have long necks because the males use their long necks and reinforced bony skulls to fight with other males and they don t eat only leaves on A tall trees and in some areas they don t eat high leaves at all The male that wins gets to mate with the females and pass on his genes B they need long necks to reach high leaves on trees so they grew them some ancestral giraffes had long necks and some had short necks and the ones with the long necks were better able to survive because they could reach leaves on tall trees A combination of some giraffes had longer necks and were better able to survive because they could reach the tall trees and males fighting with other males for a mate contribute to the long necks

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