Question

The plant hormone _____ is a gas at normal temperature and pressure. systemin salicylic acid auxin ethylene abscisic acid The plant hormone ________ is apparently synthesized from carotenoid pigments inside plastids. Salicylic acid cytokinin brassinosteroid abscisic acid jasmonate The plant hormone _________ trigger plant responses to environmental stresses such as cold snaps, high salinity, and drought. cytokinin jasmonate abscisic acid oligosaccharin ethylene

Answer 1

Answer 44: The plant hormone which is gas at room temperature, is Ethylene.

• Ethylene or CH₂ = CH_2, is gaseous at room temperature causes ripening of fruits.

Answer 45. b . Cytokinin

• Auxin and cytokinin hormones are synthesized from the carotenoid precursors

Answer 46: b Jasmonate

It is the plant hormone which shoots up in the stress conditions and provide defense response to the plants.