Answer:
Seed
Step-by-step explanation:
Seed is a small embryonic plant that is covered in a protective covering called seed coat. The formation of seed is an evolutionary success of plant because it enables them to survive harsh conditions and grow well when environmental conditions become appropriate.
Three main parts of a seed are:
Seed coat: It consists of one or more layers or covering that protect the embryo from environmental hazards.
Embryo: It is a small developing plant containing cotyledon (it can be mococotyledonous or dicotylydenous) that form small leaves , a plumule that becomes a shoot in future and a radicle that becomes root in future.
Endosperm: It is source of food for embryo and it mainly consists of starch based compounds.
Hope it help!