What are biotic factors?
Why is it a big environmental issue?
What do numeric pyramids represent?
What are persistent organic pollutants?
Explain the mutualism?
What are tropic levels? How many tropic levels can a food chain have?
What is an example of intraspecific competition?
Why transgenics are considered a threat to the environmental safety?
What is numeric pyramid? What does it represent?
What is nuclear pollution?
What are the phytoplankton and the zooplankton?
What are primary consumers? Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?
Into which type of energy is the light used in photosynthesis transformed.
Besides mercury which other heavy metals cause toxic pollution?
What are species?