Explained by the best student of the year 2024..... Reproduction in flowers......

本站添加: 2026-05-11

[00:00:01]Every great achievements never come from a comfort zone. Every great achievements never come from a comfort zone. They come from a dedication, guidance and support. By these times, good evening respected directors, the honorable judges and our presence over here. Today welcome you all to advanc cooking center. Here I am from class 12 science number one ordinary faculty and today I'm going to tell you about a very interesting topic that is about sexual reproduction into our flowering plants.

[00:00:28]As we have as we have listened about the human reproduction human humans reproduction the humans reproduce to continue their generation like that only plants also reproduce. Now here question arises that why does the plants reproduce just because the plant repro reproduce just forming the fruits and seeds. As we have listened then many kinds of the fertilization into the human reproduction. You will be shocked to know that into the plants also there are three types of fertilization that occurs. First one is the prefertilization. Second one is the double fertilization and third one is the post fertilization. Firstly let me tell let me give you a short intro of these fertilization then after I will tell you about the parts of the flower.

[00:01:10]The firstly the prefertilization. The prefertilization in which the plants reproduce with the and third with the pollen grains. Into this double fertilization plants reproduce with the pollen brain into the ovary and into the last scale the post fertilization the ovary convert into the fruit and ov convert into the seed. As these were the short intro of these three fertilization after that the reproduction occurs into the flower. Now let me tell you about the flower. As I have told you about the flowering plants at the starting only I told you about the flowering plants.

[00:01:43]into the flowering plant. The the reproduction occurs into the flower which is also called the reproductive part of the flower. Let me tell you here.

[00:01:53]First one is the anthther.

[00:01:57]Anthther in which the pollen grains comes and they stick on on the anther only. And the another one is the filament. Filament this part is known as the this part of the flower is known as the filament. When the anther and the filament come together they call as the estmen. It is the it is also known as the endosium. It is the male reproductive part of the flower. Now another one is the stigma. A stigma is also known as the gamosium. It is the which is the female reproductive part of the flower. The stigma has also three parts. Ovary style and the stigma. E stigma style and ov. These are the three parts. When the these three parts come together they are known as the piston. So firstly let me tell you about the stigma. Now as I have told about the into the anther when the fallen grains attach with the anther on that time these brains transform to the stigma. After that they go into the style which is the long stall part.

[00:02:56]After that the fallen brains comes to stigma. After that they goes from the style to ovary. When they come to the when they reaches to the ovary into the ovary there is the presence of ovule in which they reproduces to form a child.

[00:03:08]After that they become into the embryo.

[00:03:10]After that they form into the seed or the root.

[00:03:16]Now let me now let me tell you about the pollination. As I have talked about the pollen grain. Now here the question arises that from where does these pollen grain comes? Because they may not come by themsel only. There would be someone who are transforming these polling grains from somewhere to somewhere. As person let me define you what do you mean by the pollination by the word of pollination. The pollination means the transfer of the polygra from an toigma.

[00:03:41]Now let me show you by a real flower example as you would be saying here here is a flower of hibiscus. If I will ask you that what is the scientific name of hibiscus? Can you even tell me about it?

[00:03:56]Okay, if I'm here, let me tell you about what is the scientific name of hibiscus.

[00:04:00]The scientific name of the hibiscus is hibiscus rosa sinuses also known as the China rose. In it, I have a perfect example of by which we can be able to understand very easily. Here this part part as here this part is as you can see here this part is the main reproductive part of the flower. Here it is the stigma.

[00:04:24]The as you would be seeing that these yellow parts these yellow parts are the falling grains. If I will plug these if I will take these falling grains if you will do like this they will they will transform into the yellow color. If these falling grains if you will these let me tell you the one interesting facts about these fallen grains. Maybe you would not be knowing about these fallen grains. These fallen grains are brised into the protein. If these fols are used to increase the performance of the ethanols and the raceh horses in some western countries like the example like the in England these polic are transformed into the pollen tablets and the pollen syrups which in this time athletes are using it for increasing their performance and the policing grains al also used for enhancing and boosting their boosting their digestive system. These kinds of the things are interesting facts about the following as the polination are the parts of the for transforming the polymerase from anthther to stigma. There are the as you would have till the 11th class you would have read that there are two types of polination self pollination into the and the crosspollination but here I will tell you that these are the wrong things because as I have read I have read the three types of the pollination. First one is the autoami. Second one is the gonogami and second third one is the xenogami. Firstly let me explain you about the autoami. In with autoami the pollen grains transfer from the anchor to a stigma into a same flower. What happens that whenever the any insect come from any another flower to another flower on that time there is a transformation of the pollen by the length on that time there when these types of the pollination occur. These are known as the autoami example like we have discussed and second one is the second one is the xenogami which is also known as the elogami. In the zeni the transfer of the poly transfer of the pollen grace occurs from the different flowers in which whenever any insect is sitting on any one flower after sitting on then after it produces from that flower it goes to the another flower for taking the pollen. On this side this pollination called is the zenogi. And third one is the gto. It is one of the different different pollination which occurs into the flower in which what happens there is the transformation of the pollen rays which occurs into the same flower but the pollen rays are different from another and another flower and as I have told about the autoami and autoami also there are the two types chbboami and clustto. Chesmo, chesmboas and chestogamas flower. Into the chesto flower what into the chesto flower. What happens that the pollination occurred into the closed flower. When the flower has not when the tower is only become the bullet has not become the fully flower. In that only the pollination occurs and into the chesmus flower the pollination occurs but the flower has become the poly flower and it has been become the open.

[00:07:24]On that time these types of the pollination occurs.

[00:07:29]Now why pollination occurs and how does it occur into the pollination? Here are the many of the factors and many of the biotic and abiotic agent. First we let me explain about the biotic agent. It means biotic agent in animals. The animals insect pollination and second one is the bird pollination. Now let me tell you the insect pollination are also known as the entomopil. Entomopilly and in the bird pollination it is known as the oropilli oropilli. When the insect the insect the most common example is the honeybee. Honey bee is the most common example of the entomopilli. It reproduces it goes from one flower to another flower for the pollination. And the birds also do the pollination which is called the oropilli. And second and second one is the abic factor in which non-living organisms just like the wind pollination and the water pollination comes wind pollination is called the animal and the water pollination is called the hydrophily. The most common example of the water pollination or the hydrophil is the water hy and water lily. These are the most common example of the hydrophily or water pollination.

[00:08:41]As you would have seen that the lotus lotus or many kinds of the flower which occurs into the water only you would be thinking that how these kind of the pollination occurs because as I have seen that I have never seen any kinds of the insect which are going on these flowers for doing the pollination. So on that time from during the war into the water only to occur the pollination and transform into the new plant and the last one is the bad pollination which is called the crypto crypto in which also these steps the three pollination which occur. These are the three biotic factor by which the pollination occurs and also known as the agent of the pollination by which the pollination are for forming the new ones for forming the new plants or forming the new ones. So these were all about the agent of the pollination, pollination and the parts of the pollination because as we have seen into the human reproduction what happens that the fertilization happens into the human but into the flower case these are the totally different because these pollination or the reproduction occurs by the agent of the pollination like the insects waters and these wings these are the important factors for doing the pollination or for reproducing the flowers. Sigas are