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Which of the following organisms is/are unicellular organism/s?
a) bacteria                                            

b) amoeba
c) mosquito                          

d) both a and b

d

Which of the following organisms is/are multicellular organism/s?
a) animals                                            

b) plants
c) bacteria                                            

d) both a and b

d

Cell was discovered after the invention of which of the following instrument?
a) microscope                     

b) telescope
c) periscope                          

d) stethoscope

a

Who discovered and named the cell for the first time?
a) Robert Brown                 

b) Robert Hooke
c) Leevonhoek                    

d) Charles Darwin

b

Explanation:Robert Hooke FRS was an English polymath active as a scientist and architect, who, using a microscope, was the first to visualize a micro-organism.


Microscope is an important instrument in science. For which of the following it is used?
a) large objects                    

b) tiny objects
c) distant objects                

d) internal objects


b

Which of the following solution is used to stain the onion and cheek cells?
a) methanol         

b) methylene blue
c) hydrochloric acid                           

d) alcohol             

b
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