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Plant Growth and Development

Short Answer Type

101. Would a defoliated plant respond to photoperiodic cycle ? Why ?

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102. What would be expected to happen if :

(a) GA₃ is applied to rice seedlings.

(b) Dividing cells stop differentiating.

(d) You forget to add cytokinin to the culture medium

184 Views

Long Answer Type

103. What do you understand by photoperiodism and vernalisation ? Describe their significance.

318 Views

104. Describe briefly : (a) Arithmetic growth (b) Geometric growth (c) Sigmoid growth curve (d) Absolute and relative growth rates.

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105. Both growth and differentiation in higher plants are open. Comment.

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Multiple Choice Questions

106.
The Avena curvature is used for bioassay of

GA₃

IAA

Ethylene

Ethylene

IAA

1950 Views

107.

During seed germination its stored food is mobilised by

ethylene
cytokinin
ABA
ABA

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108.

Match the following and select the correct answer.

Column I		Column II
A.	Centriole	1.	Infolding in mitochondria
B.	Chlorophyll	2.	Thylakoids
C.	Cristae	3.	Nucleic acid
D.	Ribozymes	4.	Basal body cilia of flagella

A

B

C

D

4

3

1

2
A

B

C

D

1

2

4

3
A

B

C

D

1

3

2

4
A

B

C

D

1

3

2

4

857 Views

109.

A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white - coloured like albinos. Which of the following terms will you use to describe them?

Mutated
Embolised
Etiolated
Etiolated

793 Views

110.

Which one of the following growth regulators is known as stress hormone?

abscsic acid
Ethylene
GA₃
GA₃

576 Views