Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 Environmental Studies Ecosystem

'पारिस्थितिकी तंत्र' शब्द किसने गढ़ा था?

1
हैकेल
2
हम्बोल्ट
3
टेन्सले
4
ओडम
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