Why do creatures only grow to certain sizes?

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Basically i just saw a post about a massive black widow spider living in an electrical box and it got me thinking. Why is growth limited to a “general size” in most cases? Is it just natural genetic code that says ” You will only grow this much and no more”, or does it all depend on stuff like environment, nutrition, risk factors, etc?

In: Biology

7 Answers

Anonymous 0 Comments

The Square cube law. The Square of the animal x^2 must support the volume of the animal x^3. (Somewhat negated/altered by water)

https://en.wikipedia.org/wiki/Square%E2%80%93cube_law

Another factor is oxygen which may be unique to insects I don’t know all the details but insects grow larger in oxygen rich environments.

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