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00:00hi kids today we will learn about the structure of a seed so let's start kids
00:08we learned a lot about how seeds is formed how seeds is dispersed and now we
00:15will learn the structure of a seed the seed is a reproductive structure that
00:23has a baby plant inside it and also it has food stored for the growth of the
00:30baby plant the hard outer cover that protects the baby plant inside is called
00:37testa the part of the seed inside the testa that stores food for the tiny baby
00:45plant until the baby plant starts producing its own food by photosynthesis
00:51is called cotyledon or cotyledons and there can be one or two cotyledons the
01:02tiny baby plant inside the seed is called embryo embryo has two parts
01:10radical and plumeal the radical is an embryonic root which grows and develops
01:18into the root system of the plant and the plumeal is the embryonic shoot that
01:25grows and develops into the shoot of the plant the plumeal usually has two
01:33visible leaves with a growing point enclosed between them there is a scar or
01:39mark left on a seed coat by its former attachment to the ovary wall which is
01:46known as helium on the bean seed we also call the helium as the eye then
01:56there is a tiny hole in the testa opposite the tip of the radical and it
02:02allows the water to enter the seed and it is known as the micropyle now we know
02:09all parts of the seed now let's study the structure of a soaked bean seed this
02:16is a soaked bean seed it has hard outer covering which is called testa then
02:24there is a brown scar or mark on the seed coat it is called the helium and it
02:31is formed due to the former attachment to the ovary wall and this is a tiny
02:37hole in testa just on the top of the helium that allows water to enter the
02:43seed now open the bean seed into two halves and you will see two halves that
02:51are called cotyledons or seed leaves they contain food for the baby plant now
03:00the seed coat can be separated between the two cotyledons lies the embryo the
03:09radical is an embryonic root which grows and develops into the root system of the
03:15plant and the plenule is an embryonic shoot that grows and develops into the
03:23shoot of the plant kids we learned various parts of the bean seed which is
03:28a dicot that is has two cotyledons beans chickpeas gram peas have two
03:36cotyledons and are known as dicots and there are also seeds with one cotyledon
03:44and they are known as monocots maize wheat and rice have one cotyledon so are
03:54called monocots so kids today we learned a lot about the structure of a
04:01seed now you may go ahead and take a quiz to learn more bye-bye