MEDIUM
11th CBSE
IMPORTANT
Earn 100

List any four uses of auxins.

Important Questions on Plant Growth and Development

HARD
11th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY BIOLOGY VOL. I For XI Class of 10+2>Chapter 19 - Plant Growth and Development>TEST QUESTIONS>Q 6
Name a plant hormone that can never act alone.  List any three activities of this hormone in conjunction with auxins.
MEDIUM
11th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY BIOLOGY VOL. I For XI Class of 10+2>Chapter 19 - Plant Growth and Development>TEST QUESTIONS>Q 7
Name the plant hormone that inhibits plant growth and metabolism. What is the role of this hormone in seed development.
MEDIUM
11th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY BIOLOGY VOL. I For XI Class of 10+2>Chapter 19 - Plant Growth and Development>TEST QUESTIONS>Q 8
Give at least four roles of gibberellins on plant growth.
HARD
11th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY BIOLOGY VOL. I For XI Class of 10+2>Chapter 19 - Plant Growth and Development>TEST QUESTIONS>Q 9

What is abscission zone? Name its components and their functions.

HARD
11th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY BIOLOGY VOL. I For XI Class of 10+2>Chapter 19 - Plant Growth and Development>TEST QUESTIONS>Q 10
What is sigmoid growth curve? Why is it so called?
MEDIUM
11th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY BIOLOGY VOL. I For XI Class of 10+2>Chapter 19 - Plant Growth and Development>TEST QUESTIONS>Q 11
Where are auxin synthesised in plants? Mention any two of their functions?
MEDIUM
11th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY BIOLOGY VOL. I For XI Class of 10+2>Chapter 19 - Plant Growth and Development>TEST QUESTIONS>Q 1
What are the different phases of growth? Give characteristics of each.
MEDIUM
11th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY BIOLOGY VOL. I For XI Class of 10+2>Chapter 19 - Plant Growth and Development>TEST QUESTIONS>Q 2
What are weedicides? Give their effect on the ecology of a place.