Define photoperiodism.

Important Questions on Plant Growth and Development

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 13 - Plant Growth and Development>EXERCISE>Q 10

Write about the physiology of flowering. Mention the importance of photoperiodism.

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 13 - Plant Growth and Development>EXERCISE>Q 11

What is photoperiod ? How do higher plants perceive photoperiod ? With a suitable example, state briefly what a "facultative long-day plant" means?

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 13 - Plant Growth and Development>EXERCISE>Q 12

What is senescence ? Mention the changes that occur during senescence of plants.

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 13 - Plant Growth and Development>EXERCISE>Q 13

Write about the cellular changes during ageing. State the extracellular changes during ageing.

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 13 - Plant Growth and Development>EXERCISE>Q 14

Write about differentiation, de-differentiation and re-differentiation with examples.

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 13 - Plant Growth and Development>EXERCISE>Q 15

What is growth? What is grand period of growth of plants ? Write two internal and external factors of growth.

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 13 - Plant Growth and Development>EXERCISE>Q 16

What is abscission ? How does abscission take place in plants?

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 13 - Plant Growth and Development>EXERCISE>Q 17

What is photoperiodism ? What do you mean by photoperiodic induction ? How plants are classified on the basis of photoperiodism ?