Zoology is purely a science subject, emerged as a scoring optional in UPSC IAS Mains and Indian Forest Service Exam as well. Ideally, this subject cannot be taken by the students from any background. Aspirants must be a graduate in Zoology, Medicine, Botany, Life Science, Agriculture, Forestry etc. The students from non- zoology/ science may find this optional as a difficult one. For scoring well, you need not choose an easy subject, but shed your sweat and blood on that subject you have chosen. One must be thorough with the basic fact and concepts. The conceptual clarity, it will help you to answer an indirect and twisted question as well.
The Zoology optional syllabus includes diverse elements. After analyzing, the various components in the syllabus one must pick out the right books. This optional paper demands an intense reading.