Question

In a hardening process
A. Plantlet is placed in reduced light and high humidity for short time
B. Plantlet is placed in favourable conditions for long time
C. Plantlet is transfer in a new fresh medium
D. Plantlet is placed in a high light intensity

Answer 1

Hint: Hardening is the process in which plants which are grown inside are transferred to face the external environment and adapt to the natural environment and its conditions, it encourages the change of environment around a plant from softer growth to firmer and then harder growth outside. This process is similar to the process of adaptation where growing plants are transferred to an environment which is different from the current environmental conditions in which they are growing.

Complete answer:
Hardening process basically means to nurture a seedling first inside at controlled temperature and environment gradually to an outer harder environment for their growth and adaptation. This process has subsequently increased the production technologies in plants that are intentionally grown for commercial purposes like bananas. They are grown under a controlled environment with adequate temperature, pressure etc after that they are transferred to the outer environment. Plants when are at the primary stage of exposure to an external environment are firstly placed in a firmer place for their growth before hard exposure outside thus they are kept in reduced light with high humidity by which they gradually adapt to the harsh outer environment and grow accordingly.

Hence we can conclude that the hardening process involves option (A) Plantlet is placed in reduced light and high humidity for a short time which is correct and best fitted in this process for the growth of the plant.

Note:
Adaptation is the process in which an organism, whether a plant or animal, micro-organisms accept the changes in the outer environment and eventually their body changes to indulge in an external environment or habitats, which enhances their evolutionary changes. Their adjustments made them stiffer to survive in harsh environmental conditions outside.