what I read in biology to get 320 minimum marks in neet

You will have to cover both the zoology and biology subject. Below I am giving name of important chapters-
Diversity and biodiversity, classification needs, three types of domain life, systematic and taxonomy, information about the species, taxonomy, binomial theory, tools and types of taxonomy- zoos, botanical garden, herbaria, Museums, five types of kingdom classification, mineral classification and its features, fungi and Protista.

I would suggest you to practice MCQs along with the syllabus chapters, this will be very good for your preparation and this will also let you know how will be the exam pattern so you will be familiar with the same easily.

Good Luck!!!