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Environmental Issues

Question
CBSEENBI12002014
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(a) List the three states the annuals and biennial angiosperms have to pass through during their life cycle.
(b) List and describe any two vegetative propagules in flowering plants.

Solution

(a) The three states through which the annuals and biennial angiosperms pass during their life cycle are:
(i) Vegetative or Juvenile phase
(ii) Reproductive phase
(iii) Senescent phase
(b) Vegetative propagules are the parts/units of a plant which can be used for vegetative propagation, e.g. roots, stems, leaves, etc. Root propagules include the production of a new plant via roots, e.g. fleshy roots in case of sweet potato, tapioca and Dahlia. Vegetative propagation through leaves, many plant leaves have adventitious buds which help in the development of a new plant, e.g. Begonia, Bryophyllum, etc.

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