NEET BIOLOGY

Detailed explanation-1: -Plant growth regulators are factors that act as intrinsic intercellular regulators of plant growth and development. So, the correct option is ‘Intrinsic intercellular control’.

Detailed explanation-2: -light, water and oxygen. oxygen, genetic and plant growth regulators.

Detailed explanation-3: -Intrinsic factors include the genetic, physiological, and pathological characteristics of an individual; in other words, these are traits that are “intrinsic” to a person rather than being determined by that person’s environment.

Detailed explanation-4: -The genotype of a plant affects its growth. For example, selected varieties of rice grow rapidly, maturing within 110 days, whereas others, in the same environmental conditions, grow more slowly and mature within 155 days. A producer has control over the genetic factor by his choice of variety.

Detailed explanation-5: -Intrinsic factors-includes both genetic, intercellular factors like chemicals such as plant growth regulators. Extrinsic factors-includes light, temperature, water, oxygen, nutrition etc.