Which of the following is the correct order for a simple food chain?

Symbiosis is a relationship between the members of

A. same species

B. two species

C. different species

D. equal species

Burning of petroleum produces

A. nitrogen dioxide

B. ammonium dioxide

C. sulphur dioxide

D. carbon dioxide

The process in which inorganic nutrients are enriched with water is called

A. industrialization

B. pollution

C. eutrophication

D. contamination

Considering the Earth's ecosystem, the consumers are classified as

A. autotrophs

B. heterotrophs

C. tertiary autotrophs

D. secondary autotrophs

The hydrocarbons (alkanes and alkenes), oxides of nitrogen (NO, NO2) and Sulfur (SO, SO2, SO3) and fluorine (F2) are released by the

A. fertilizer industries

B. thermal industries

C. textile industries

D. steel industries