What are persistent organic pollutants?
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What is plankton?
Define ecology?
Explain why transgenics are considered a threat to the environmental safety?
What is transgenic food?
Define a food chain?
How does biological diversity relate to the characteristics of the abiotic factors of an ecosystem?
What are deciduous trees?
Explain some examples of migratory animals?
Define transgenic food?
What is benthos?
What is gpp?
What are the differences between the age pyramids of developed and under developed countries?