The process of fertilization in flowering plants was discovered by S. G. Navashin. Why is this process called double fertilization?

1) a pollen grain contains two sperm;
2) one merges with the ovum (the seed embryo is formed from the zygote), the other – with the central diploid cell (the endosperm develops).

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.