Biodegradation
Decomposers
5.3 - Changed from Decompostion (Microbiology) to Decomposition (Living things). BT Microbiology removed, BT Food chains added.
Decomposition (Living things)
Organic matter
Coalification
Food chains
खाद्य शृंखला
Rantai makanan
食物連鎖
먹이 사슬
Chuỗi thức ăn
食物鏈