Species could compete for water, food, land, etc.
Secondary structure of protein.
in seconday structure, the polypeptide chain is spirally arranged in linear form.
Teriary structure of protein
In tertiary structure the polypeptide chain is arranged in three dimension.
Quaternary structure of protein
In this structure more than one polypeptide chain are arranged in three dimension forming a globular shape.
Answer:
Punctuated Equilibrium
Explanation:
The phyletic gradualism model and the punctuated equilibrium are aspects models of macroevolution that are characterised with varying patterns.
However, the punctuated equilibrium model of evolutionary history consists of geologically long periods of inactivity (stasis) with little or no evolution, interrupted or "punctuated" by geologically short periods of rapid evolution.
