What is the main means by which autotrophic beings obtain energy?
How different are the concepts of migration, emigration, and immigration
Explain the parasitism?
What is the group of aquatic beings composed of large number of photosynthetic beings?
Explain why is cannibalism an inharmonious intraspecific ecological interaction?
What is transgenic food?
What is the role of the ozone layer for the living beings?
What is numeric pyramid? What does it represent?
Why transgenics are considered a threat to the environmental safety?
Why plutonium reprocessing is a big environmental issue?
Define a food chain?
Explain global warming?
Why the tropical forests are also known as stratified forests?
What are biotic factors?
What is a biodigester?