Question

The growth curve obtained in plants is generally:

• A. Linear
• B. Zig-zag
• C. Sigmoid
• D. Circular Correct Answer: (C) Sigmoid

Hint:

To remember this concept easily, think of the letter 'S' for Sigmoid and associate it with Shape! A natural plant growth graph always traces an S-curve, starting with a slow creep (Lag), shooting straight up (Log), and flattening out at the top (Stationary).

Answer 1

The Correct Option is C

Step 1: Picture the growth over time.
If you plot a plant's size against time, the graph is not a straight line. It has slow, fast and slow parts.

Step 2: Name the three parts.
First a slow start, then a fast middle, then a flat top when growth settles down.

Step 3: See the shape.
Slow then fast then flat together make the letter S. This S shape is called a sigmoid curve.

Step 4: Final choice.
The plant growth curve is sigmoid, which is option 3.
\[ \boxed{\text{Sigmoid}} \]