for example elephant isn’t the same size as a sheep
In: 0
They exploit different ecological niches. A mosquito’s biology is going to be starkly different from a blue whale’s because they exist in different environments, eat different things, face different predation, etc. Creatures grow big and small as a species over time based on the evolutionary pressures imposed upon them. In the face of predation, being bigger tends to aid survival. In times of scarcity, being smaller tends to aid survival as you need fewer resources, unless of course you can use your size advantage and take resources from other creatures. Apply these pressures constantly over tens or hundreds of millions of years, and you’ll end up with lots of biological diversity, including physical size.
Latest Answers