What are autotrophic beings? What are heterotrophic beings?
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what are the difference between migration, emigration, and immigration?
What is the most abundant form of nitrogen in nature?
What are the main chemical compounds that destroy the ozone layer?
Can food chain present quaternary consumers without having secondary or tertiary consumers?
How do biodiversity, the total number of living beings, and the biomass respectively vary during the ecological succession?
What are heterotrophic beings?
Explain the primary energy source for life on earth?
Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?
Explain water cycle?
What is predatism?
Which type of energy is the light used in photosynthesis transformed.
Why is leguminous crop rotation used in agriculture?