Contents

Where the pyramid of energy is narrowest?
a) top                                    

b) center
c) same everywhere

d) base

a

Explanation:At the top of pyramid, tertiary consumers are present which have lowest energy


Changes in an Ecosystem and its Effects:


Which of the following is considered as medium of life in an ecosystem?
a) soil

b) temperature    

c) acids 

d) water

d

Which of the following directly depends on water?
a) plants                                               

b) animals
c) all forms of life             

d) fungi

c

How much aquatic life is present on earth?
a) 10%  

b) 30%                  

c) 50%  

d) 90%

d

Explanation:Aquatic life means those organisms which are living in water


Which of the following is/are critical part of global water cycle?
a) forests                                              

b) wetland
c) grassland                          

d) all of these        


d

Explanation:The water cycle, also known as the hydrologic cycle or the hydrological cycle, is a biogeochemical cycle that describes the continuous movement of water on, above and below the surface of the Earth.