What is the reason of senescence leaf ?

Related MCQs

• Match list I with II types of leaves List I List II (p) leaf included with in seed I scaly leaf (q) small or papery leaf II bract (r) stamen and Carpel III seed leaf (s) which a flower develops is IV soprophylls P Q R S P Q R S
• Which hormone inhibits senescence of vegetative parts and plants ?
• Which is natural growth inhibitor or senescence inducing hormone ?
• Which hormone is responsible for growth of leaf-apex ?
• Which of the following is found in high concentration in healthy leaf ?
• Match the list : Column I Column II (P) Volvox (i) Chemotaxis (Q) Mimosa (ii) Phototaxis (R) Antherozoids of bryophytes (iii) Movement / tropism (S) Leaf tendril (iv) Thigmotropism
• Match the list : Column I Column II (P) Plasmodium of slime mould (i) Ciliary movement (Q) Chlamydomonas algae (ii) Circular movement (R) protoplasm of tradenschantia leaf (iii) Rotational movement (S) Protoplasm of hydrilla (iv) Amoeboid movement leaves
• Match the following : column I Column II (P) Opening of leaf blade (i) Epinasty (Q) Closing of leaves (ii) Hyponasty (R) Zigzag movement in apical bud (iii) Nutation (S) Spiral and helical growth of tendrilar plants (iv) Circumnutation (T) Pulsation in leaflets of indian telegraph plant (v) Variation
• Leaf apex is modified into tendril in:
• Leaf morphology helps in :