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Biology, 27.04.2016 08:00

Birds that can fly usually have hollow, lightweight bones. penguins, a species of flightless bird, have heavy and dense bones. why is this an advantage?
they are less likely to be injured on the ice
their bones them retain body heat in the cold temperatures
they are more efficient hunters in the water due to heavier bones
they are more efficient hunters on land due to heavier bones

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