For biology it's divided into two that is zoology and botany starting from zoology

Zoology - human reproduction , evolution, immunity, animal kingdom (only from NCERT) 

Botany- plant kingdom, organisms and population, ecosystem, plant reproduction biological classification

This are some very imp chapters with high waitage of biology . Coming to physics and chemistry.

Chemistry- organic (very imp.) , Solutions , chemical bonding (again very very imp) electrochemistry , chemistry in daily life ,.NOTE - do not ignore inorganic chemistry it makes difference during the exam

Physics- laws of motion (v imp) { not many questions ask from this chapter but it's the basic for all the physics chapter don't ignore it} ,,,, optics , work energy and power, electrostatic , current energy 

Hope uh are clear now all the best for ur exam

Hello Maurya,

In order to know the important topics and chapterwise weightage for NEET 2019, please go through the link given below

https://medicine.careers360.com/articles/neet-chapter-wise-weightage-and-important-topics

Thanks for query on this platform, you may visit again

All the best for your examination.