Structure Of A Bean Seed

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Transcript

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