For years, many of us relied on ______ (biotic) use to treat various infection.
For years, many of us relied on ______ (biotic) use to treat various infection.
逆境分为生物逆境（biotic stress）和非生物逆境（abiotic stress）。
逆境分为生物逆境（biotic stress）和非生物逆境（abiotic stress）。
The ecological niche of a species refers to: A: Position of the organism in the food web B: Role in the community and all associated biotic and abiotic factors C: Mode of reproduction and food habits D: Behavior in relation to other species in the community
The ecological niche of a species refers to: A: Position of the organism in the food web B: Role in the community and all associated biotic and abiotic factors C: Mode of reproduction and food habits D: Behavior in relation to other species in the community
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