Species are considered:
 

1. Real basic units of classification
2. The lowest units of classification
3. The artificial concept of the human mind which cannot be defined in absolute terms
4. Real units of classification devised by taxonomists
Subtopic:  Taxonomy 2: Classification up to Genus |
From NCERT
AIPMT - 2003
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh