______ is the powerful growth inhibitor.

Important Questions on Plant Growth and Development

HARD

11th Tamil Nadu Board

IMPORTANT

Biology Botany Standard 11>Chapter 15 - Plant Growth and Development>Evaluation>Q 2

If the diameter of the pulley is $6$ inches, length of pointer is $1$ inches and distance travelled by the pointer is $5$ inches, then calculate the actual growth in length of plant.

MEDIUM

11th Tamil Nadu Board

IMPORTANT

Biology Botany Standard 11>Chapter 15 - Plant Growth and Development>Evaluation>Q 5

Seed dormancy allows the plants to

MEDIUM

11th Tamil Nadu Board

IMPORTANT

Biology Botany Standard 11>Chapter 15 - Plant Growth and Development>Evaluation>Q 6

Which one of the following method are used to break the seed dormancy?
 

MEDIUM

11th Tamil Nadu Board

IMPORTANT

Biology Botany Standard 11>Chapter 15 - Plant Growth and Development>Evaluation>Q 7

Write the physiological effects of Cytokinins.

MEDIUM

11th Tamil Nadu Board

IMPORTANT

Biology Botany Standard 11>Chapter 15 - Plant Growth and Development>Evaluation>Q 8

Describe the mechanism of photoperiodic induction of flowering.

HARD

11th Tamil Nadu Board

IMPORTANT

Biology Botany Standard 11>Chapter 15 - Plant Growth and Development>Evaluation>Q 9

Give a brief account on Programmed Cell Death (PCD).