Based on their environment, why would giraffes with long necks have a genetic advantage over giraffes with short necks?

They can fight easier

They can reach their food source

They are closer to the sun

3 answers

and can access more nutrients and energy from vegetation that other animals cannot reach, giving them a better chance of survival and reproduction. This provides a clear genetic advantage as they can access more food for their survival and reproduce with better health and strength to pass on their long-necked genes to their offspring.
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They can reach their food source.