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
Which of the following is the correct order for a simple food chain?
A. grasshopper, sparrow, grass, hawk
B. grass, grasshopper, sparrow, hawk
C. hawk, sparrow, grass, grasshopper
D. grass, hawk, grasshopper, sparrow
Symbiosis is a relationship between the members of
A. same species
B. two species
C. different species
D. equal species
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