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Botany Questions and Answers

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156. Retina contains the sensitive cells called
 
  • A. rods and cones
  • B. cortex and fovea
  • C. cones and cortex
  • D. rods and pelvis
 
157. Rearing of bees is called
 
  • A. agriculture
  • B. sericulture
  • C. apiculture
  • D. vermiculture
 
 
158. Survival of the fittest was proposed in this theory of evolution by
 
  • A. Mendel
  • B. Darwin
  • C. Devries
  • D. Lamarck
 
159. The stiffness of paddy straw is due to
 
  • A. stone cells
  • B. collenchyma
  • C. silica
  • D. hard fibres
 
160. --- are chemicals used to kill pests.
 
  • A. weeds
  • B. manures
  • C. pesticides
  • D. fertilizers