What is nekton?
Explain the main chemical compounds that destroy the ozone layer?
Explain different types of wastes?
Which is the autotrophic group responsible for the production of most part of the molecular oxygen of earth?
What is the difference between the concepts of community and population?
What is the zooplankton?
Define mutualism?
Define water cycle?
What is biologic control?
What is protocooperation?
Define population growth rate?
How can a great biological diversity protect an ecosystem from environmental damages?
Explain the three main types of tropic pyramids studied in ecology?
What are the main types of waste?
What are some examples of parasitism?