Explain water cycle?
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Define a population?
What is population growth rate?
What is the formula of the net primary production (npp)?
What is dry mass?
Define ecological succession?
What is a community?
What are some examples of parasitism?
Explain the main chemical compounds that destroy the ozone layer?
what is transgenic food and its health hazards?
Can food chain present quaternary consumers without having secondary or tertiary consumers?
What do biomass pyramids represent?
What is gpp?