Answer:
(a)
lAA- Weed free lawn
2-4 D and synthetic in dole acetic acid kill the broad leaf weeds Thus, used as
weedicides.
B.
ABA-Stomatal closure ABA is a stress hormone. Under water stressed conditions,
it shuts down stomata to reduce the rate of transpiration.
C. Ethylene,
a gaseous hormone is responsible for ripening of fruits.
D. GA
Gibberellicacid does the phenomenon of bolting, i.e., when sprayed on the
plant, it increases the inter nodal region of stem, thus making a plant
extremely tall.
E. Cytokinin
was isolated from herring sperm DNA, for the first time, Other option are
incorrect.
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