There is no particular branch which deals with extinction, but it would fall under zoology,
pathology is a branch of science that deals with?
Biology.
The branch of science that deals with molecules changing into other molecules is chemistry.
Biology is the branch of science that is the study of living things.
This branch is termed forensic science.
Epidemiology is the branch of science that deals with the frequency and distribution of diseases
Earth Science
the science which deals with heredity is called genetics
The branch of science that deals with human memory is neuroscience. Also there is psychology which also deals with memory.
Life science. Also, biology if you would include that as a branch of science.
this is the branch of science which deals with the study of enveroment.
The branch of science that involves the study of caves is speleology.