Because most of the sperm cells die on their journey to the egg.
well in a way they all do (millions), that's what the sperms purpose is, its to go after the egg.
In plants, fertilization occurs when one sperm cell from a pollen grain fuses with an egg cell to form a seed. Therefore, only one sperm cell is needed to fertilize one egg cell and produce a seed.
Pollen grains are carried by the wind, insects, birds, and other animals to fertilize plants for the purpose of reproduction. This process is essential for the transfer of male gametes to female reproductive organs in many plant species.
Typically, only one sperm fertilizes an ovum to form a zygote. Multiple sperm attempting to fertilize the ovum can lead to abnormalities in the resulting embryo.
That is a good question. Both egg and sperm has the same number of chromosomes. But then the size of the egg is very big compared to sperms. Here the egg has lot of food material stored in them. that is necessary for cell multiplication after the conception. sperms has to run fast for fertilization. You can not run fast with some heavy weight on your back. Also the number of the sperms is very high and so many big sperms will create the problem of accommodation in the semen.
Just one.
one
For the same reason an Oak tree produces so many acorns. So that maybe one of them manages to make it to the egg and fertilize it.
because some of the sperm cells might be in-active therefore the healthiest one will fertilize the egg
This normally happens in fallopian tube. Many sperms are needed to dissolve the outer coat of the egg. Only one can penetrate the egg to fertilize the same.
Many sperm cells are needed to fertilize an egg cell because only one sperm cell can successfully penetrate the egg cell's protective layer and fuse with its nucleus to form a zygote. Competition among the sperm cells ensures that the strongest and healthiest sperm cell is most likely to successfully fertilize the egg.
well in a way they all do (millions), that's what the sperms purpose is, its to go after the egg.
Only one.
only one
In plants, fertilization occurs when one sperm cell from a pollen grain fuses with an egg cell to form a seed. Therefore, only one sperm cell is needed to fertilize one egg cell and produce a seed.
Only one sperm is required to fertilize an egg. One is both necessary and sufficient in order for an egg to be fertilized. But in order to be confident that one will make it, you need a certain minimum sperm count.
You can fertilize as many as you want, but on each person's farm, you have only a certain amount of fertilizer. I hope this helped.