WAEC - Biology (1988 - No. 4)
Double fertilization is said to occur in flowering pants because?
two embryos are formed
one egg is fertilized twice
two sperms fertilize each egg
one embryo and endosperm nucleus are formed
two sperms and two pollen grains are involved
Vysvětlení
This process involves the joining of a female gametophyte with two male gametes.
It begins when a pollen grain adheres to the stigma of the carpel, the female reproductive structure of a flower.