Which one of the following is not a characteristic of plant cells in the phase of elongation?

Related Formula

Plasticity: Ability of plants to follow different pathways in response to environment or phase of life to form different structures.

Core Logic

Heterophylly (e.g., in buttercup due to environment, or cotton, coriander, larkspur due to growth phases) is a classic example of plant plasticity.

Step 1: Selection

The phenomenon is called Plasticity. Option (4) is correct.

Pattern Recognition

Heterophylly in cotton/coriander/buttercup = Plasticity.

Chapter Mix

Class 11 Biology: Plant Growth and Development

Related Formula

2,4-D (Synthetic Auxin) = Herbicide GA₃$GA_3$ (Gibberellin) = Malting/Brewing Kinetin (Cytokinin) = Nutrient mobilization (delays senescence) ABA (Abscisic Acid) = Stress hormone (Stomatal closure)

Core Logic

• 2,4-D: Synthetic auxin used as a selective weedicide/herbicide arrow$\rightarrow$ III
• GA₃$GA_3$: Speeds up malting process in brewing industry arrow$\rightarrow$ I
• Kinetin: Promotes nutrient mobilization to delay senescence arrow$\rightarrow$ IV
• ABA: Stimulates stomatal closure under stress arrow$\rightarrow$ II

Step 1: Match Verification

Match sequence: A-III, B-I, C-IV, D-II. Correct option is (3).

Pattern Recognition

2,4-D = Herbicide (A-III). ABA = Stomatal closure (D-II). Matches option (3).

Chapter Mix

Class 11 Biology: Plant Growth and Development