Germination of Cress Seeds

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Background point 1:

There are several conditions that affect the germination of seeds. Most factors are external but there are also some internal conditions that affect the germination of seeds, even though this is quite rare. The most common and the most important external conditions and factors that affect the germination of seeds are oxygen, water, temperature and also in some cases light or darkness. Some plants require several variables for successful seed germination. As this is quite rare, this often depends on the individual seed and its natural habit.

Let’s focus on the most important factors that affect germination of seeds.

Firstly we have oxygen which is required by the seed that is germinating for metabolism. The
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Background point 2:

In the world, there are two basic sorts of seed and they have been named monocotyledon respectively dicotyledon. Dicot seed contains of two parts which have been named cotyledons. Their job is to supply the food for the growing of the young plant. An excellent example of a dicot seed is the bean seed. Dicot seeds consist of an outside cover, called seed coat, and also an embryo inside the bean. The Greek word for “two” is “dis”, and that is where we get “di” from.

Seed which consists of only a single cotyledon are known as monocots. A corn seed is a very good example of a monocot. The seed of a monocot stays in one piece and does not split up. As the bean seed, the corn seed also has a seed coat, but this coat doesn’t get off as easily. There is as well a part of the seed called the endosperm and this is the part where the monocot plants store their food. The Greek word for “one” is “monos”, and that’s where we get “mono” from.

Of course seeds consist of several components, but the three main and most significant parts are the seed coat, the endosperm and the embryo.

The outer membrane of the seed is known as the seed coat and that is the part of the seed that is visible. The coat of the seed is often hard and very difficult to break. The outer membrane’s function is to protect the sensitive parts that are inside the seed from diseases and common damages. Even though all seeds have a seed coat, there is

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