Biology
Grade-10
Easy

Question

Which of the following exhibits the highest rate of respiration?

  1. Growing shoot apex
  2. Germinating seed
  3. Root tip
  4. Leaf bud

hintHint:

  • The rate of respiration varies among different tissues and organs.
  • The general rule of thumb is that a tissue's respiration rate increases in direct proportion to its total metabolic activity.

The correct answer is: Germinating seed


    Germinating seeds exhibit the highest rate of respiration i.e. the rate of respiration is higher during germination in seeds.
    • The respiration rates of vegetative tissues typically decrease from the point of growth to more differentiated regions, while developing buds typically exhibit extremely high respiration rates.
    • Since the seeds are alive and require more oxygen for growth, the oxygen consumption rate is higher when the seeds undergo germination.
    • When a plant tissue is mature, its preparation rate either stays nearly constant or slowly declines as the tissue gets older and eventually experiences senescence.

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