Which one of the following terms describes not only the physical space occupied by an organism, but also its functional role in the community of organisms?

Which one of the following is the best description of the term 'ecosystem'?

Which one of the following is not responsible for the extinction of a species ?

Which one of the following is the correct order of biological organisation ranging from organism to biosphere?

Which of the following is NOT a biogeochemical cycle?

Which of the following is NOT responsible for increase in the biodiversity of an ecosystem ?