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Botany Questions and Answers

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41. The respiratory pigment present in man is
 
  • A. phycoerythrin
  • B. phycocyanin
  • C. haemoglobin
  • D. haemocyanin
 
42. The structural unit of nervous system is
 
  • A. axon
  • B. denterites
  • C. nephron
  • D. neuron
 
 
43. Human heart is surrounded by a double membrane called as
 
  • A. sarcolemma
  • B. arachnoid membrane
  • C. pleura
  • D. pericardium
 
44. Earthworms are used in
 
  • A. culture
  • B. vermiculture
  • C. treatment of sewage
  • D. waste disposal
 
45. Wind power and tidal power will reduce
 
  • A. air pollution
  • B. water pollution
  • C. sound pollution
  • D. soil pollution