From where does the seed get its food when it is in the embryo stage ?
Answers
Explanation:
When the seed begins to grow, one part of the embryo becomes the plant while the other part becomes the root of the plant. Food for the plant is stored in the cotyledons.
Inside a Seed
INSIDE A SEED Krystal Picket
SUMMARY: This is a lesson on the initial growth of a seed. The three main parts of a seed will be discussed and explored, as well as the part they play in the seeds growth and development.
BACKGROUND INFORMATION:
Seeds have a seed coat which protects them while they grow and develop, usually underground. Inside the seed there are is an embryo (the baby plant) and cotyledons. When the seed begins to grow, one part of the embryo becomes the plant while the other part becomes the root of the plant. Food for the plant is stored in the cotyledons. Some seeds when split apart seperate into two halves. These seeds have two cotyledons and are hence called dicotyledons. Other seeds have only one single unit, with only one cotyledon. These are called monocotyledon seeds.
The "baby" plant grows entirely from stored energy and food from the cotyledons until it reaches sunlight. The food supply in the seed will last up to about two weeks. As the seed develops, the embryo always grows upward, and the root always grows downward. Even when the seedlling is turned upsidedown, the plant will right itself. All of this is due to the gravitational pull of the Earth.
Seeds need a certain amount of water to grow. However, too much water is detremential. Seeds also need oxygen and the right minerals from the soil. They do not, however, need light to grow. In fact, they often grow faster in the dark.
Seeds have a small hole on the outside that lets liquids such a water in. This hole is the point at which the seed was joined to its pod. The pod fed nutrients for the cotyledons through this hole.
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