Assertion $(A)$: Growth occurs when anabolic processes are greater than catabolic processes.
Reason $(R)$: Growth is the result of metabolism.

Which of the following statements are correct regarding the conditions necessary for plant growth?
i. Microelements and macroelements are required for the proper growth of the plant.
ii. For proper growth of plant,optimum temperature ranges between $15^{\circ} C-25^{\circ} C$.
iii. In the absence of oxygen,the process of respiration and release of energy takes place in all plants.
iv. Gravitational force decides the direction of growth of the shoot and root.
v. Light is essential for the germination of some seeds and photosynthesis.

When certain tomato plants are kept in a dark room for a few days,they develop an albinism-like color. What is this phenomenon called?

Given below are two statements about plant growth.
Statement $I$: Curve for arithmetic growth is linear.
Statement $II$: Curve for geometric growth is exponential.
In the light of the above two statements,choose the most appropriate answer from the options given below.

Water is required in plant growth for

In $......$,growth occurs throughout life,whereas in $......$,growth is observed only up to a certain age.