How does grass spread seeds? Detailed answer

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How does grass spread seeds? Detailed answer

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How does grass spread seeds?

Herbs are the most common plants in the world. There are about 7000 species of them. A sea of grass covers the fields, sometimes thousands of square kilometers in area. They are called prairies, steppes, plains, valleys. These are the pampas of South America, the Russian steppes, the South African velds.

Many herbs are reproduced using seeds. Seeds are spread in many ways. Some grass seeds are covered with long hairs and are dispersed by the wind. Some roll on the ground. Birds carry seeds in their beaks because they feed on them. When they fly with seeds, the seeds may fall from their beaks.

Some grass seeds have sharp spines. With these spines they cling to animals or people passing by a plant, and they are "transported" on a skin or clothing. By chance, during trading expeditions, many grass seeds were transported over great distances around the world. For example, ships carried melissa grass seeds from Africa to the New World.

Plant stems were used as bedding for slaves. When they were thrown on the floor, the seeds spilled out. In this way, the herb spread from Africa to North America. Some herbs live one season, then die. They need to be sown every year. Other herbs are perennial. Grasses in the pastures or on your front lawn grow for years, their roots endure winters well. In the spring, young shoots grow from them.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

What happened to the ship Saint Mary?

"Holy Mary" - a brigantine, a two-masted sailing ship. In November 1872, she left New York for Genoa in northern Italy with 12 people on board. Her cargo consisted of 1700 barrels of spirits for fortifying wine. After 4 weeks, "Holy Mary" was noticed 400 km from Gibraltar. The captain of the ship that spotted her was surprised how the sails were set. He got the impression that no one controls the brigantine. He sent a team to find out what was the matter. The team found that there was no one on the ship, but there was meat on the table, cups with still warm tea. However, the food was untouched. The chronometer and ship's papers were gone.

Only the log has been preserved, but there have been no records for the last 10 days. One of the two boats has disappeared. The rudder was not tied before the ship was abandoned. At that time, an investigation was carried out. There were many rumors around this case. One theory claims that pirates attacked the ship and destroyed the crew. But it seems strange that they did not touch the cargo, the money that was on board. Maybe the team got sick or thought something was wrong with the cargo?

Did she leave the ship of her own free will? Why was there no one left alive who could tell what happened? Nobody can give answers to these questions. And we will probably never know what happened to "Saint Mary".

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Artificial brain needs sleep too 13.06.2020

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“We are studying diving neural networks, which are systems that learn in the same way that a living brain does,” said Los Alamos Lab computer scientist Yizing Watkins. “We were fascinated by the prospect of learning a neuromorphic processor in a way similar to how humans and other biological systems receive information from the environment in the process of development.

Watkins and her research team found that the network simulation became unstable after extended periods of unsupervised training. When they exposed the networks to states similar to the waves that the living brain experiences during sleep, stability was restored.

The discovery came as a research team was working on building neural networks that are close to how humans and other biological systems learn to understand. Initially, the group struggled to stabilize simulated neural networks undergoing dictionaryless training, which involves classifying objects without prior examples for comparison.

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