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(a) Draw a diagram to show spore formation in Rhizopus.
(b) With the help of an example differentiate between the process of Budding and Fragmentation.
(c) Why is vegetative propagation practiced for growing some type of plants?
Answer:
(a)
(b)
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Budding |
Fragmentation |
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It is an asexual method of reproduction in which a small part of the organism grows out as a bud , which then detaches and grows into a new organism. |
It is an asexual method of reproduction in which the body of a simple multicellular organism breaks into two or more pieces upon maturing and each piece grows into a new organism. |
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Hydra reproduces by budding. |
Organisms like Spirogyra and sea anemones reproduce by fragmentation. |
(c) Vegetative propagation is practised for growing some types of plants because:
- Plants that do not produce seeds can reproduce using this method.
- The offspring are genetically identical to the parent plant.
- It is a cheaper, easier and rapid method of reproduction in plants.
- Because of the presence of vegetative reproductive parts such as tubers, corns, and bulbs, many plants are able to withstand unfavourable environmental conditions.
