NEET Biology Plant Growth And Development Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Plant Growth And Development Topic Based

Question & Answer Discuss:

A sigmoidal curve is obtained in geometrical growth because

(a) one daughter cell remains meristematic while the other daughter cell differentiates and matures.

(b) it has lag, log and then stationary phase. Plant Growth and Development 135

(c) of the effect of environment on mitosis.

(d) none of the above

Answer: (b)

In geometric growth, if total growth is plotted against time, an S-shaped or sigmoid curve is obtained. It consists of four parts-lag phase, log phase (exponential phase) phase of diminishing growth and stationary phase (steady growth for organs or organisms of indefinite growth).

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