Correlation is used to assess the strength and direction of a relationship between two variables. It is helpful when you want to determine if and how two variables are related to each other, but it does not imply causation. Correlation analysis is commonly used in research, statistics, and data analysis to understand patterns and associations between variables.
There are numerous branches of biology and it is ever evolving. Start with Agriculture, anatomy, astrobiology, biochemistry and follow the alphabet through to toxicology, virology and zoology.