Write a brief account of abscisic acid.

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 two synthetic auxins. Give four functions of 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

Which parts of the plant produce gibberellin?  State two functions of this hormone and mention why it was named gibberellin?

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 8

Name the plant hormone which was discovered from fungus. Give its any four 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 1

Describe an experiment that would demonstrate that growth stimulating hormone is produced at the tip of coleoptile.

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 2

Explain different phases of growth with the help of diagram.

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 3

How will you measure the rate of growth?  Describe an instrument used to measure the increase in height of an angiospermic plant.

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

Auxanometer is used to measure

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 -2

Natural cytokinins are synthesised in tissues for