A sperm's tail is whip like i.e. very long and slender. This structure helps to propel the sperm forward in a snake like motion through the energy produced by the 'midpiece'. Otherwise all of the sperms would move laterally or in repetitive circles, thus making it impossible for any of them to enter the egg, hence a baby being born.

• All materials available in our environment which satisfy our needs are called as Resources.
• All resources have some value. Value means worth. Some resources have economic value and some do not, but both are important and satisfy human needs.
• Some resources can become economically valuable with time.

 Earthing is the process of connecting the exposed metal parts of an electrical circuit to the ground
Usually an electric appliance such as a heater, an iron box, etc. are fitted with all the three wires namely live, neutral and earth. The earth wire is connected to the metallic body of the appliance. This is done to avoid accidental shock. Suppose due to some defect, the insulation of the live wire inside an electric iron is burnt then the live wire may touch the metallic body of the iron.

     When the iron box is in use, the metallic body will also be increased to 110V. If we accidentally come in contact with such a metallic body we are sure to get an electric shock. If the earth wire is properly connected to the metallic body it protects us from an electric shock.

झरना व्यक्तिवाचक संज्ञा

किसी भी विशेष व्यक्ति, वस्तु या स्थान के नाम का बोध कराने वाली संज्ञा ही व्यक्तिवाचक संज्ञा कहलाती हैं। यानी, व्यक्तिवाचक संज्ञा सभी व्यक्ति, वस्तु या स्थान की संपूर्ण जाती में से ख़ास का नाम बताती हैं।

जैसे:

व्यक्ति- महात्मा गाँधी, भगत सिंह, रमेश, पवन, सीमा, विकास आदि।

वस्तु- कुरान, बाइबल, रामायण आदि।

स्थान- बैंगलोर, दिल्ली, मुंबई, लखनऊ आदि।

Farm System: Farming is a kind of system in which various inputs and processes are involved to obtain production. Machineries, seeds and fertilisers are the physical inputs for agriculture. Labour is the human input. Crops are the outputs of agriculture.

There are 30 numbers between the square of these two numbers.
formula is :- if we consider n=15 & n+1=16
then the formula to find the numbers between them is 2n
therefore 2×15=30

A pathogen is simply defined as a tiny living organism that is a carrier of diseases in a host. Pathogens need a host body for surviving and when it enters a host, it avoids the immune responses of the host. Instead, the pathogen utilizes the host body’s resources to replicate before exiting and spreading to a new host.

The power sharing is desirable in democracy because of the following reasons:

the power sharing helps to reduce the possibilities of conflicts between various ethnic groups living in a society.

it helps in ensuring political stability since a country can be run by all the communities without give preference to any maturity community.

it also reduce violence and linguistic problems in India there is diversity in language but our constitution gives equal rights to all the languages.

Modern reasons.  power sharing is the actually being called the true spirit of democracy essence of democracy it helps bringing political economic social and cultural stability to the nation.

The Tsunami- Summary

The lesson begins with a few stories from the Andaman and Nicobar group of islands. The first is of a manager of a cooperative society named Ignesious who was woken up by his wife because she felt the earthquake. After keeping his television on the floor, he rushed his family out of the house where they saw large waves coming towards them on the beach. Two of his children who had held hands with their mother’s father and brother, were swept away along with their mother. Only two children who stuck with Ignesious were saved. 
Next is the account of a policeman in the Nicobar islands named Sanjeev who managed to save his wife and baby daughter but upon hearing cries from his guesthouse cook’s wife, he ran into the water which swallowed both of them.
Meghna, a thirteen-year old who was swept away by the waves, along with her family and seventy other people, managed to stay alive by holding on to a wooden door. She could not be seen by relief helicopters for two days and came to the shore only through a wave.
Fourth is the story of Almas Javed’ family. As soon as her father got to know about the tsunami, he took everyone to a safer place. In the process of doing so, Almas’ grandfather got hit in the head by something and when Almas’ father tried to save him, they got carried away with the waves. Almas’ mother and aunts held on to the leaves of a coconut tree which was uprooted by the giant waves when Almas found a wooden log, she climbed on it and managed to save herself.
 Next is the story of the Smith family from South England but had come to visit Thailand to spend their vacations on a beach resort. Penny and Colin Smith had two daughters,  out of which the elder one, a ten-year old named Tilly, helped save the entire family and a lot of other people from the gigantic waves. As she saw the sea rise and the beach getter smaller, she recalled a lesson from her geography class that illustrated visuals of the tsunami that hit the Hawaiian islands in 1946. She got hysterical and shouted for everyone to run. Her parents took the children to the third floor of the hotel that survived at least three waves of the tsunami. Along with their family, a lot of other people who followed them were saved.

The third and the last part of the lesson talks about how animals managed to stay safe. Two beliefs offer an explanation for the same. First, they possess sixth sense and can predict disasters. Second, they have acute hearing abilities that make them sensitive towards the earth’s vibrations. Facts state that animals at the The Yala National Park in Sri Lanka managed to protect themselves while sixty human lives were taken by the giant and strong waves. Only carcasses of two water buffalos were found. One such man in Galle reported that his two dogs refused to go for their usual run along the beach which they are usually very excited for. This saved his life as well.

The study of architecture help us in reconstructing the history of the  modern period in India in several ways which are:

Explanation:

• Architecture helps us to analyse and study the buildings which have been created in history.
• Architecture can be used to understand the economy, type of reign, art, culture of that time being.
• Architectural history research lets one appreciate the landscape and modern built environment, starting from ancient times and continuing to contemporary life.
• Understanding this history is critical in promoting understanding of how underlying institutions in a larger cultural sense influence our lives.

Amanita phalloides

Amanita phalloides accounts for the majority of fatal mushroom poisonings worldwide. Mushroom poisoning refers to harmful effects from ingestion of toxic substances present in a mushroom. These symptoms can vary from slight gastrointestinal discomfort to death in about 10 days.

In the beginning the camel was a lazy animal. He didn’t want to work and lived in the middle of a desert away from other working animals. But the animals never forgot him and his nature. They wanted him to work like them. They complained against him to the Djinn, who was in-charge of all deserts. The Djinn decided to punish such an idle animal. He told the Camel to work like other animals but the Camel showed no willingness to work. This made the Djinn angry. He put a curse on the Camel. Soon the Camel’s back puffed up into a big bump. This is how the Camel got a hump.

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