Absolute or relative growth?
"Absolute or relative growth?" is a free, interactive Class 11 Biology simulation for NEET, built on the NCERT section "Absolute and relative growth rate" in Plant Growth and Development. Two leaves of different starting areas gain area side by side; readouts show absolute growth (cm²/day) and relative growth (per cm² of starting area) NEET has asked about this idea 1 time in 10 years of papers.
From the lesson Absolute and relative growth rate in Plant Growth and Development. Change the values and watch what happens.
What it shows
NCERT §13.1.4
Two leaves of different starting areas gain area side by side; readouts show absolute growth (cm²/day) and relative growth (per cm² of starting area)
Controls
3 to try
- Sliderleaf A start area 1–50 cm²
- Sliderleaf B start area 1–50 cm²
- Slidergain per day 0–10 cm² (each)
Try this
Make both leaves have the same absolute rate but leaf B five times the relative rate.
Common mistake
The bigger leaf has the higher relative rate when gains are equal.
In NEET
10 years of papers
Asked 1 time in 10 years of NEET.
See the past questions: Plant Growth and Development (chapter)
The idea behind it
NCERT §13.1.4
- Growth of two living systems can be compared in two ways.
- Absolute growth rate: the total growth per unit time, measured and compared as it is.
- Relative growth rate: growth per unit time expressed on a common basis, for example per unit of the initial parameter.
- Two leaves of different sizes, A and B, may each gain 5 cm² of area in the same time. Their absolute growth rates are equal, but the smaller leaf has the much higher relative growth rate, because 5 cm² is a larger fraction of its starting area.
Questions
4 answers
- What does the "Absolute or relative growth?" simulation show?
- Two leaves of different starting areas gain area side by side; readouts show absolute growth (cm²/day) and relative growth (per cm² of starting area)
- What mistake does the "Absolute or relative growth?" simulation fix?
- A common mistake it clears up: the bigger leaf has the higher relative rate when gains are equal.
- Has NEET asked about this idea?
- Yes. NEET has asked about this idea 1 time in 10 years of papers.
- Is this simulation free?
- Yes. It is free and runs in the browser on a phone or a laptop. It belongs to the lesson "Absolute and relative growth rate" in Plant Growth and Development (Class 11 Biology).
Embed this simulation
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