Question

Which of the following exhibits the highest rate of respiration?
(a) Growing shoot apex
(b) Germinating seed
(c) Root tip
(d) Leaf bud

Answer 1

Option (b) Germinating seed

All metabolically active cells and tissues have high rate of respiration

Germinating seeds have the highest rate of respiration. As soon as the water is imbibed by seeds, hydrolytic enzymes come into action and mobilise the resetve food materials so the seeds show high metabolic activity and gerrninate into a tiny plant.
All these activities require energy, which is derived from increased rate of respiration.