MEDIUM
11th West Bengal Board
IMPORTANT
Earn 100

Draw the sigmoid curve mentioning the different phases.

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 4
Describe the role of different factors affecting growth.
HARD
11th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 13 - Plant Growth and Development>EXERCISE>Q 5
What is abscission ? Describe the formation of abscission zone during abscission.
HARD
11th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 13 - Plant Growth and Development>EXERCISE>Q 6
Describe the growth of seedlings and the role of gibberellic acid.
EASY
11th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 13 - Plant Growth and Development>EXERCISE>Q 7
What is mean by ageing ?
HARD
11th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 13 - Plant Growth and Development>EXERCISE>Q 7
Describe the various morphological and physiological changes occur in human during aging.
HARD
11th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 13 - Plant Growth and Development>EXERCISE>Q 8
Write about the different factors affecting senescence and ageing in human beings.
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.