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Plant Growth and Development

Multiple Choice Questions

11.

Typical growth curve in plants is

sigmoid
linear
Stair-steps shaped
Stair-steps shaped

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12.

Typical growth curve in plants is

sigmoid
linear
stair-steps shaped
stair-steps shaped

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13.

A drupe develop in

Wheat
pea
tomato
tomato

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14.

Phototropic curvature is the result of uneven distribution of

gibberellin
phytochrome
cytokinins
cytokinins

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15.

The technical term used for the androecium in a flower of China rose (Hibiscus rosa siensis( is

monadelphous
diadelphous
polyandrous
polyandrous

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16.

One of the commonly used plant growth hormone in tea plantations is

ethylene
abscisic acid
Zeatin
Zeatin

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17.

Root development is promoted by

abscisic acid
auxin
gibberellin
gibberellin

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18.

Stroma in the chloroplasts of higher plants contains

light -independent reaction enzymes
Light -dependent reaction enzymes
ribosomes
ribosomes

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19.
One of the synthetic auxins is

NAA

IAA

GA

GA

NAA

The term auxin is applied to the indole -3-acetic acid (IAA) and to other natural and synthetic compounds having certain growth regulating properties.
NAA (Naphthalene Acetic Acid) and 2-4-D (2-4 dichlorophenoxy acetic acid) are synthetic auxins.
IAA and IBA (Indole Butyric acid) have been isolated from plants. All these auxins have been used extensively in agricultural and horticultural practices.

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