Colleges in Tamil Nadu

Hello Madhavi, You can pursue M.Sc. in Marine Biology at Alagappa University based on your degree merit,
The latest cutoff is 83.16%, the minimum requirement for this course is 50% in qualifying exam.
Mandatory Subjects : Biology / Bio-Maths
Candidates must have passed 10+2 with the mentioned marks and

Hey Sudhakar, you can pursue M.Sc. in Biochemistry at SRM Institute of Science and Technology based on your degree merit,
M.Sc in Biochemistry is a 2-year postgraduate program that allows you to understand the chemical processes related to living organisms. This course contains a mixture of biology

Cutoff for B.Sc. in agriculture is 600 for General, 480 marks for OBC/ST/SC and for reserved PwD 480 marks.

Their is no special cut off for any course at sastra, it depends on the availability of seats
However in 2021 and 2022 for CSE your SASTRA UNIVERSITY rank should be less than 700 and 502 respectively (approximately)

There is no cutoff in sastra. It solely depends on your rank in sastra's merit list which will be uploaded after a while. For cse the rank must be not more than 500. Only then, you will have a chance. All this is for stream 1. Coming to stream 2 your board percentage should be more than 98.6%.

Yes you would take admission in Tanjavur is in the state of Tamilnadu then the exam you have appeared for TNEA that is Tamil Nadu Engineering and Agriculture entrance test.So according to the previous year record it is informed that the cut off rank for CSE in Sastra Tanjavur college of Engineering

You should get around 85 or more marks to get CSE at VIT Vellore and 65-70 would be more than enough to get IT Branch. The VIT cutoff rank (and marks out of 120) for CSE and IT is around Rank-840 (Marks-96.6).

AILET is for admission in B.A. LL.B. In National Law University, Delhi. VIT Vellore accept the Valid CLAT / ISAT Score for admission in B.A. LL.B.

Depends on your field of Masters. Since you haven't mentioned it, I will assume your looking for something along M.Sc. Lines
I'll list the best colleges for Masters in Tamil Nadu to the best of my abilities:
Presidency College (NIRF Rank 3)
Loyola College (NIRF Rank 4)
Madras Christian College (NIRF Ran