Zoology is comprised of numerous categories, known as sub-disciplines. For instance, primatology is the study of primates, entomology is the study of insects, ichthyology is the study of fish and ornithology is the study of birds.
A public accountant works for a public accounting firm that performs auditing, tax, consulting and accounting services for other businesses, organizations or individuals.
CPA's (as a a profession) normally work in public accounting....dealing with auditing financial statements, performing compliance audits, or offering advisory services to clients. A CPA is really just a license, and a CPA could theoretically perform ANY job.