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Long Answer Type(i) Juvenile phase. The period of growth in life of organisms before they start reproducing sexually and attain a level of maturity is called juvenile phase. It is known as Vegetative phase in plants.
(ii) Reproductive phase. The period of active reproductive behaviour when the organisms show marked morphological and physiological changes is called reproductive behaviour. It is followed by senescence phase.
(iii) Senescence phase. The period when the reproductive phase ends and concomitant changes occur in the body such as slowing of metabolism is called senescence phase. It is the last phase when the organism grows old and it is followed by death.Short Answer TypeWhy do the new plants grow on Bryophyllum leaf ?
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