Question

What is the biological significance of senescence?

Answer 1

Biological significance of senescence :
Old and inefficient organs are replaced by young and developing organs.

Leaf fall in deciduous trees reduces the rate of transpirational loss.
Recovery of nutrients from senescing organs by diverting the nutrients to the younger parts where they are utilised as reserve materials.
Leaf fall adds leaf material and its break down products to the soil, which are again used by the plants for their growth.

Answer 2

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The main biological significance of senescence is: It helps in recycling the mineral nutrients. There by enrich the nutrients in the soil so that it helps in the seed germination.