please explain me reproduction in plants
Answers
Reproduction means creating a new generation from the parent either in sexual or asexual way.
Types of reproduction in plants :-
(1) Asexual reproduction : - ( a plant give rise to a new plant without seeds, the new plant looks very similar to its parent plant, it takes less time to grow )
- (i) Vegetative propagation
- (ii) Budding
- (iii) Fragmentation
- (iv) Spore formation
(2) Sexual reproduction involves :- ( a plant which grows with the help of seeds, the new plant produced can differ from it's parent plant , It takes a long time to grow )
- (i) Self pollination
- (ii) Cross pollination
- (iii) Fertilization
- (iv) Seed dispersal.
There are two type of Flowers
1 - Unisexual
The plants which have either only stamen or only pistil present in it is called as unisexual flower, in such plants cross pollination takes place.
2 - Bisexual flowers
The plants which have both stamen and pistil in it, here self pollination takes place.
{ We will know more about different types of pollination further in the answer}
Male part Stamen consists of Anther and filament
Female part Pistil consists of Stigma, style and ovary
Reproduction in flowers is termed as sexual reproduction as it involves two parents that is Pollen grain i.e male part present in Stamen and Ovules (eggs) i.e female part present in pistil.
Transfer of pollen grains from anther to stigma
Pollen grains are present in anther, they have a protective coat which prevents them from drying .
Pollen grains are very light in weight they can be carried by wind,water and animals or insects which visits to flower.
Pollination is classified in two types :-
1) Self pollination
When the Pollen of the same plant falls on the stigma of the same plant is known as self pollination .
2) Cross pollination
When the pollen falls on a different flower of same plant or different plant of same kind is known as cross pollination
When male and females gametes fuses with each other to form a zygote is called fertilization, the zygote further turns into an embryo.
The fruits are ripened ovary. From ovules seeds are developed.
- Dispersal is the scattering of seeds by agents like wind, water and animals
- Seed dispersal takes place with the help of wind, water and insects
- It prevents competition among the plants for space sunlight water and also avoid over crowding