Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Knowledge Ecology and Environment Ecology and Functions of an ecosystem
Trophic levels in a food chain show -
1
Functional level
2
Energy level
3
Niche
4
More than one of the above
5
None of the above