EVERYDAY SCIENCE

Detailed explanation-1: -In a coordinated mechanism one sperm cell fuses with the egg cell, and the second with the central cell (Sprunck, 2020). Once fertilized the egg cell grows into the embryo while the central cell develops into the endosperm, the tissue that nourishes the embryo (like the placenta in humans).

Detailed explanation-2: -plant fertilization is the joining of male and female gametes, resulting in a zygote. The most generalized form of this process requires four steps: pollination, germination, penetration of the ovule, and fertilization. After fertilization, the zygote divides to form an embryo.

Detailed explanation-3: -In both gymnosperms and angiosperms, the young plant contained in the seed, begins as a developing egg-cell formed after fertilization (sometimes without fertilization in a process called apomixis) and becomes a plant embryo. This embryonic condition also occurs in the buds that form on stems.

Detailed explanation-4: -Each plant starts life from the zygote formed by the fusion of an egg and a sperm cell. The zygote gives rise to a multicellular embryo that displays a basic plant body organization and is surrounded by nutritive endosperm and maternal tissue.