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(a) Identify the modes of asexual reproduction in each of the following organisms :
(i) Hydra
(ii) Planaria
(iii) Amoeba
(iv) Spirogyra
(v) Rhizopus
(b) List three advantages of vegetative propagation.
(c) Why can fertilisation not take place in flowers if pollination does not occur ?

 

 

 
 
 
 
 

Answers (1)

a)

(i) Hydra-  Budding & Regeneration.

(ii) Planaria -  Regeneration.

(iii) Amoeba-  Primarily by Binary fission, Multiple fission.

(iv) Spirogyra- Fragmentation.

(v) Rhizopus - Spore formation.

b)

  • This method is quicker and more certain.
  • It produces identical offsprings.
  • Flowers produced by vegetation are of superior quality.

c) For pollination both of the male and female gametes for the fertilization process and in flowers female gamete is required to carry to the male gamete for fertilization. So, due to the absence of pollen fertilisation cannot take place in flowers.

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Safeer PP

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