HARD
11th CBSE
IMPORTANT
Earn 100

What is seed dormancy? Explain the factors which cause dormancy.

Important Questions on Plant Growth and Development

MEDIUM
11th CBSE
IMPORTANT
All in One BIOLOGY CBSE Class 11>Chapter 15 - Plant Growth and Development>ASSESS YOUR TOPICAL UNDERSTANDING>Q 13
What are plant growth regulators? Mention their characteristics in seeds. 
HARD
11th CBSE
IMPORTANT
All in One BIOLOGY CBSE Class 11>Chapter 15 - Plant Growth and Development>ASSESS YOUR TOPICAL UNDERSTANDING>Q 14
Mention five main groups of natural plant growth regulators. Write a note on discovery, physiological functions and agricultural/horticultural applications of any one of them.
HARD
11th CBSE
IMPORTANT
All in One BIOLOGY CBSE Class 11>Chapter 15 - Plant Growth and Development>ASSESS YOUR TOPICAL UNDERSTANDING>Q 15
What has led to the discovery of cytokinins? Give their physiological effects on plants.
HARD
11th CBSE
IMPORTANT
All in One BIOLOGY CBSE Class 11>Chapter 15 - Plant Growth and Development>ASSESS YOUR TOPICAL UNDERSTANDING>Q 16
Discuss the findings of Charles Darwin and Francis Darwin experiment on the effect of the unilateral light on the coleoptiles of canary grass.
EASY
11th CBSE
IMPORTANT
All in One BIOLOGY CBSE Class 11>Chapter 15 - Plant Growth and Development>ASSESS YOUR TOPICAL UNDERSTANDING>Q 1
Name two short-day plants and long-day plants.
EASY
11th CBSE
IMPORTANT
All in One BIOLOGY CBSE Class 11>Chapter 15 - Plant Growth and Development>ASSESS YOUR TOPICAL UNDERSTANDING>Q 2
Define vernalisation.
MEDIUM
11th CBSE
IMPORTANT
All in One BIOLOGY CBSE Class 11>Chapter 15 - Plant Growth and Development>ASSESS YOUR TOPICAL UNDERSTANDING>Q 3
Why instead of shoot apices leaves are considered to be the major sites of light perception?
MEDIUM
11th CBSE
IMPORTANT
All in One BIOLOGY CBSE Class 11>Chapter 15 - Plant Growth and Development>ASSESS YOUR TOPICAL UNDERSTANDING>Q 4
Differentiate between winter and spring varieties of wheat.