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What is a Seed?

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In botany, a seed is an undeveloped plant embryo and food reserve enclosed in a protective outer covering. More generally, the term “seed” refers to anything that can be sown.

Most seeds contain an embryo that grows into a seedling under optimum conditions. They also have endosperm, which is a storage reservoir for starch and oil.

What is a seed?

In botany, a seed is an undeveloped plant embryo and food reserve enclosed in a protective outer covering. They are the product of a fertilized ovule (the fruit of a flower) and, given appropriate growth conditions, become the new plant, which is called a seedling.

In angiosperms, or flowering plants, seeds develop from ovules contained in the ovary. These ovules are fertilized with sperm from pollen. The zygote forms a seed coat around the ovule and grows within the mother plant to a certain size before its development is halted.

The seed coat protects the seed from physical, mechanical, temperature-related and water damage. It contains the embryo, which germinates under ideal conditions and is nourished by endosperm. The cotyledon is the first leaf to develop within the seed.

Germination

During seed germination, the embryo inside the seed starts to develop and grow. It absorbs water and oxygen, and then begins to swell as the seed coat breaks open. Eventually a root or radicle emerges, followed by a shoot that contains the leaves and stem.

Seed germination requirements vary for different plant species, but generally include water, air, temperature and ultimately access to light. Some seeds require full sun for germination, while others germinate best in darkness.

Most seeds remain dormant or inactive until conditions are right for germination. This can occur when the seed is physically dormant (hard or thick seed coat), chemically dormant (abscisic acid or gibberellin levels), or a combination of both.

Endosperm

Endosperm forms the second stage in seed development and is the most important part of a seed. It is responsible for embryogenesis and stores food in the form of starch or other nutrients.

It is produced in both angiosperms and gymnosperms. It is formed during apomixis, which is the process whereby an asexual embryo develops without prior meiosis.

The development of the endosperm is dependent on the genomes of both parents. It also requires communication between the genes of the embryo and the surrounding seed coat.

There are two types of endosperm formation, the nuclear (or liquid) type where cell wall formation is delayed for a number of cell divisions and the cellular type where the walls are initiated instantly. Liquid endosperms are common in sweet corn and coconut water, while cellular types are found in seeds of wheat, barley and oat.

Cotyledons

A cotyledon is the first leaf formed in the seed of a plant. It contains stored food that provides energy to the growing plant until it can produce its first true leaves and stem.

The number of cotyledons within a seed can vary from 8 to 20 or more, depending on the type of plant. Some cotyledons are only ephemeral, lasting days after germination; others persist for a year or more.

Many seeds germinate with a single cotyledon, which may remain below the ground (hypogeal) or emerge above it (epigeal). In plants like daylily, a cotyledon is usually hypogeal and remains below the soil until the true leaves are formed.

In a seed, there is also a structure called endosperm that helps to store nutrients for use by the developing embryo. It is a thick, fleshy structure with two ends, a plumule and a radicle. The plumule develops into a shoot and the radicle develops into a root.

By Weed Smoker

Rastafarianism is an African religion and there is a great deal of people in the world that follow its teachings. In fact, there are even people that have embraced the lifestyle that is closely associated with Rastafarianism in the past such as musician and entertainer Bob Marley and Rastafarian clothing designer Larry Lloyd.

As the name implies, the Rastafarian lifestyle includes wearing clothes and accessories that are made out of beads, feathers, and other natural materials. The clothing in the Rastafarian tradition often includes animal skin, such as a horse's hide. The hair of the Rastafarian man is also usually long.

The lifestyle of Rastafarians is largely based on traditional ways of living in their native countries, as well as the African traditions and rituals that are passed down. Rastafarians have a great deal of respect for the animals that are part of their diet. Most people that follow this type of lifestyle believe that they have a direct link to the animals that they eat. In fact, in some cases, the animals may be eaten during the ceremony that follows the ceremony.

In addition to having a great deal of respect for the animals, Rastafarians also have a great deal of respect for their hobbies and pastimes. They often dress in clothes that are similar to that of the animals that they eat. Rastafarians also have a great deal of respect for the clothing that they wear and the clothing that is used to decorate their home. The color of the clothing and accessories that are worn by Rastafarians is often very similar to that of the animals that they eat.

Although Rastafarians follow a lifestyle that is based on a natural way of life, some of them do have to be in the workplace. For example, many Rastafarians work as musicians or entertainers. In order to do so, the musician may have to give up some of his or her time in order to become successful. In addition, some musicians choose to work for other musicians, such as Bob Marley and the Wailers. However, other musicians choose to work for themselves, like Bob Marley.

Although the Rastafarian lifestyle is different from that of other people, the Rastafarian lifestyle is also a life of peace and harmony. The Rastafarian people live a simple life where they eat animal meat, live in their own homes, and do not engage in much of the materialistic activities of society.