Kishor, 99% of the questions asked in NEET, come from the officially designated syllabus. And NEET Biology syllabus is as follows:

Diversity in Living world

Structural Organization in Animal and Plants

Cell Structure and Function

Plant Physiology

Human Physiology

Reproduction

Genetics and Evolution

Biology and Human Welfare

Biotechnology and its applications

Ecology and Environment

MCI has omitted topics related to Frog and Earthworm and only Cockroach has been included. But there have been times when questions regarding Frog or Earthworm have been asked in the exam. When you are studying the Structural Organisation in Animal and Plants, also please refer to the topics Annelida and Amphibians. It is better to be prepared than to be sorry. If you are looking for Online NEET coaching then we do have NEET Knockout package which has more than 5000 videos and concept videos. This coaching is backed up by Artifical Intelligence and has previous question papers back dated to 17 years. If you are appearing for NEET 2020,  And if you are preparing for NEET, you may as well try our NEET Knockout package: https://learn.careers360.com/knockout-neet-may/ . And because you have 2 more months to prepare for NEET, you may as well use this opportunity