How will you eradicate weeds from a field? from Biology Plant G

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11. How will you eradicate weeds from a field?


Some auxins like 2,4-D when used in low concentration act as weed killers. It is toxic to dicotyledonous broad leaved weeds growing along graminaceous crops. The hormone does not affect the mature monocotyledenous plants. 
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12. What is floral hormone ?
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13. How can a fruit be made to ripen artificially?
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14.

How can we quantitatively compare the growth of living system?

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15. What is plasticity?
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16. Which phenomenon is introduced by auxin ?
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17. What is scarification ?
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18. Give the structural formula of Indole-3-acetic acid (IAA).
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19. Give the structural formula of Indole butyric acid (IBA).
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20. Name an antisenescence hormone.
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