Anatomy.
Taxonomy
Botany is the study of plants.
Etymology deals with the derivations and the history of words. It is not a branch of biology.
Cell biology I would think!
Cells are what make up biological organisms, but Biochemistry is what makes up Cells.
Taxonomy deals with classification, a Taxonomist uses physical features of an organism to classify it.
Cancer research, particularly related to biology, as it deals with the anatomy of humans.
zoology
Taxonomy deals with classification of organisms I think, into e.g species, families etc.
cell biology because cell biology deals with the all organelles in a cell and a nucleus is one of the organelle of the cell
Microbiology is dealing with the biology of microbes and small organisms, such as bacteria. Human biology is a completely different field - it deals with the study of humans on all different levels (molecular upwards).