Study of flower yielding plants
Study of spiders
Study of fossils
Study of virus
Study of Cells
Study of language
Deals with the study of origin of new from old
Computer science
Engineering is his field of science
he studied the field of science.
A field of science is a specific part of science that somebody studies. E.g. the study of animals is called 'zoology'.
Neurochemistry
zoology, vetinary science, marine biology, herpetology, mammology, ornithology etc. are some of the field of study of animal science