Hello there! 

Greetings! 

I can't say that you will be able to solve all the questions from ecology just by reading ncert but yes you can answer 95 to 98 % of questions from neet . So , I will suggest have time then you can go for allen module otherwise ncert is enough as there's no 100% surety of anything and then you have to study chemistry and physics as well. If I talk about this year's neet biology section then there were 46 questions asked from 12thstandard syllabus and 44 questions from the 11th standard. It had 9 difficult questions, 33 moderate questions and 48 easy questions. Most of the questions were directly from NCERT and were concept based. So , ncert is enough but if you enough time, you can go for extra materials.
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thankyou 

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