Question

While describing the dynamics of growth in plants, Relative Growth Rate (RGR) is determined by the following formula.

• A. \(\mathrm{RGR}=\frac{\mathrm{dn}}{\mathrm{dt}}\)
• B. \(\mathrm{RGR}=\frac{\mathrm{dt}}{\mathrm{dn}}\)
• C. \(\mathrm{RGR}=\frac{\mathrm{n}}{\mathrm{AGR}}\)
• D. \(\mathrm{RGR}=\frac{\mathrm{AGR}}{\mathrm{n}}\)

Hint:

RGR expresses growth per unit of initial size, so it is a ratio of absolute growth rate to size.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept
Absolute growth rate (AGR) is the actual increase in size per unit time, \(\dfrac{dn}{dt}\).

Step 2: Key Point
Relative growth rate (RGR) is the growth per unit time compared with the initial size \(n\).
So \(\mathrm{RGR}=\dfrac{1}{n}\dfrac{dn}{dt}=\dfrac{\mathrm{AGR}}{n}\).

Step 3: Compare the options
Option D gives AGR divided by n, which matches.

Final Answer:
RGR equals AGR divided by n. \[ \boxed{\text{(D) }\mathrm{RGR}=\dfrac{\mathrm{AGR}}{\mathrm{n}}} \]