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Which of the following is/are the example/s of the molluscs?
a) snail                                 
b) Oyster
c) Octopus                         
d)
all of these


Which of the following group of invertebrates do not have any head?
a) Worm                             
b) Sponges
c) Insect                              
d) 
Echinoderms


Starfish is the example of……….
a) Worm                             
b) Sponges
c) 
Echinoderms
d) Insect 


The following picture (Brittle star) is the example of………


a) Echinoderms               
b) Sponges
c) Insect                              
d) Worm


The number of various types of living things found at a particular place is called……….
a) similar organism     
b) biodiversity
c) diversity                  
d) none of these


The type of plants and animals no longer found in biodiversity is called……..
a) 
extinct                            
b) endangered
c) both a and b                 
d) none of these