1.

What are the different modes of asexual reproduction ? Give them with examples.

Answer»

Asexual reproduction takes place by six different methods. They are : 

(1) Fission 

(2) Budding 

(3) Spore formation 

(4) Regeneration 

(5) Fragmentation and 

(6) Vegetative propagation

(1) Fission : Single celled organisms split into two equal offsprings or more offsprings. 

Ex : Paramoecium, bacteria. 

(2) Budding : A growth on the body as a bud grows to form identical copy of parent. 

Ex : Yeast. 

(3) Spore formation : Spores are produced in sporangium. 

Ex : Rhizopus, mucor, bacteria, ferms and mosses. 

(4) Regeneration : Ability of organisms to give rise to new individual organisms. 

Ex : Hydra, flatworm, tapeworm. 

(5) Fragmentation : New individual growth from a separate piece of parent organism. 

Ex : Flatworms, moulds, lichens, spirogyra. 

(6) Vegetative propagation :

(a) Natural propagation : 

(i) Leaves : 

Ex : Bryophyllum 

(ii) Stems :

Ex : Stolon – Vallisneria, Strawberry

Bulbs – Onion

Corms – Colacasia

Tuber – Potato

(b) Artificial propagation : 

(i) Layering : Eg : Nerium, guava, orange, rose. 

(ii) Cutting : Eg : Rose, Hibiscus, Sugarcane. 

(iii) Grafting : Eg : Sapota, Guava, Mango.



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