3)

A seed is really a small plant embryo, surrounded by a nutritional layer known as the endosperm, all of which is covered in a hard protective shell called the seed coating. Fertilization occurred; all that is needed is the proper environment to encourage the embryo to grow. When this occurs, the plant quickly sprouts, first producing stem and leaves for support and the gathering of water and nutrients, as well as the production of energy via photosynthesis.

Roots also grow, absorbing nutrients and moisture from the soil. Transfer of nutrients from the roots to the higher portions of the plant, as well as some transfer of energy from the photosynthesis occurring above the ground to the roots, is facilitated by certain cells within the stem of the plant. The production of flower petals and the plant's reproductive organs occurs last in the plant's life cycle; for some plants this...
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