The lakes and forests are best classified as examples of
A. artificial ecosystem
B. natural ecosystem
C. natural biosphere
D. artificial biosphere
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