Which of the following are true of plant hormones? (can be morethan one)

		They travel through the vascular system to reach different partsof the plant.
		The same hormone can elicit different responses.
		They are all chemically similar.
		They can affect plant growth and development at different timesof their life cycle.
		They are required in small amounts to exert their effect.
		They are all synthesized in response to stress.