Besides mercury which other heavy metals cause toxic pollution?
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What are some examples of interspecif competition?
What is biodiversity?
Can food chain present quaternary consumers without having secondary or tertiary consumers? Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?
What is the climax stage of an ecological succession?
What is population growth rate?
Define ecological succession?
What is the nitrogen cycle?
Explain different types of wastes?
Define species?
what is transgenic food and its health hazards?
what are the difference between migration, emigration, and immigration?
How can a great biological diversity protect an ecosystem from environmental damages?