Question

Which nutrient is essential for growth, cell division, root lengthening, seed and fruit development and early ripening?

• A. Nitrogen
• B. Phosphorus
• C. Potassium
• D. Calcium

Hint:

Remember the "Big Three":
N: Leaves (Vegetative).
P: Roots and Fruits (Reproduction/Energy).
K: Overall health (Regulation).

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question requires identifying a macro-nutrient that plays a multi-faceted role in plant physiology, specifically focusing on energy transfer, cell division, and reproductive development.

Step 2: Detailed Explanation:

• Phosphorus is a vital macro-nutrient often referred to as the "energy currency" of the plant because it is a key component of ATP (Adenosine Triphosphate).

• It is essential for the process of cell division (mitosis) and the development of new tissue, which directly contributes to root lengthening.

• Phosphorus is heavily involved in the transition of the plant from the vegetative stage to the reproductive stage. It promotes vigorous flowering and fruit set.

• One of its most distinctive roles is promoting early ripening of crops and the healthy development of seeds.

• Nitrogen (A) is primarily responsible for vegetative growth and green color. Potassium (C) helps in water regulation and disease resistance. Calcium (D) is vital for cell wall structure.

Step 3: Final Answer: Phosphorus is the nutrient essential for cell division, root development, and early ripening.