Nature has a very special way of making new plants through tiny
things called seeds. Seeds are very important to our lives, from these tiny
beings the plants, that we need to survive, will grow. A seed is a ripened
ovule of a plant, this is what produces new plants. The seed is a key part in
the never ending cycle of reproduction. There are two kinds of seeds,
To start off you have to know exactly what a seed is. A seed id the
ripened ovule of a seed plant before it is germinated. There are many parts
to a seed. The outside layer, which is called the testa, acts as protection for
the small plant buried inside. The inside part of the seed is known as the
endosperm. This can be split into two parts. These two parts are known as
cotyledons or seed leaves. This provides nourishment for the plant when it
first breaks out of its seed coat and before it has had time to establish its
roots or make its own food. Buried deep inside is the tiny plant itself, this is
known as the embryo or germ. Tho tiny now, this small thing will grow into
a simple flower or a large tree. Attached to the cotyledons are two
structures. During germination, beneath the cotyledons is the hypocotyle,
the tip pf this is called the radical. The radical is the first to break out of the
seed coat and the first true root of the plant. Below the cotyledons is the
epicotyl, which produces the stem and leaves.
Before you learn about the process of germination, you have to know
just where the seed comes from and just how the process works. First the
pollen from the anthers grip onto the stigma of the flower. The pollen tube
grows down through the pistil, this pollen tube is the passage way for the
small pollen grains. The pollen tube allows the pollen grains to reach the
ovule inside the ovary. When the pollen grain unites with the egg cell the
zygote is developed, this zygote is what
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