Which of the following is the unit of productivity of an Ecosystem?

1. A. ( KCal m -2 ) yr -1
2. B. gm -2
3. C. KCal m -2
4. D. KCal m -3

Attempt this NEET 2025 Biology question free — pick an option to reveal the correct answer and a step-by-step explanation. Then join NEET Mastery Quest to practise 15,000+ PYQ and 2027-syllabus questions.