Explain the process of sexual reproduction in angiosperms.

Process of sexual reproduction in angiosperms: There are two processes which are involved during sexual reproduction i. e. Pollination and fertilization. In pollination, the pollen of stamen falls on the stigma of carpel where they make a tube towards ovary where ovule is present. When the pollen reaches the ovary and fuses with ovule, it produces zygote which turns into seed, this process is called fertilization.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.