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Ask QuestionPosted by Maira Fatimah 5 years, 11 months ago
- 1 answers
Yogita Ingle 5 years, 11 months ago
- The formation of coal takes millions of years, which is why it is an exhaustible and non-renewable natural resource.
- It was formed around 300 million years ago when the earth was covered with swampy forests.
- When plants in these forests- mainly trees, mosses, ferns, and reeds died, they fell into the swamps.
- Thus there was a thick layer of dead vegetation in the swamp formed.
- As years passed, more and more plants died and many such layers were formed, one above each other.
- The topmost layers compressed the layers below. Heat and pressure caused some physical and chemical changes and eventually, some carbon-rich deposits were formed.
Posted by Pranav Shashidhar 5 years, 11 months ago
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Diksha? 5 years, 11 months ago
Posted by Pawan Kumar 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
• The first step is the study of fossils through the techniques such as carbon dating or tracing down their descendants. to the earth
• As far as evolution is concerned, it can be studied by analyzing the genetic pattern of the organism’s right from the past to present.
• One can study the structural designs by classifying them into homologous and analogous.
It will help to correlate the animal and plant species.
Posted by Som Chandra 5 years, 11 months ago
- 3 answers
Posted by Pawan Kumar 5 years, 11 months ago
- 1 answers
Yogita Ingle 5 years, 11 months ago
A. voluntary action is cerebellum.
It controls and coordinates voluntary movements like body posture, balance, coordination, etc.
B. involuntary action is medulla.
It deals with autonomic functions of the body like breathing, heart rate etc.
Posted by Rahul Dubey 5 years, 11 months ago
- 3 answers
Yogita Ingle 5 years, 11 months ago
Gutenberg was the son of a merchant. Since his childhood he had seen wine and olive presses. He also learnt the art of polishing stones, and became a master goldsmith and also became an expert in creating lead moulds. Such moulds were used for making trinkets.
Gutenberg used his knowledge to bring innovation to the print technology. He used the olive press as the model for the printing press and used the moulds for casting the metal types for the letters. Gutenberg perfected the system by 1448. The first book printed by him was the Bible.
Initially, the printed books resembled the written manuscripts in appearance and layout. In the hundred years between 1450 and 1550, printing presses were set up in most parts of Europe. The growth of the print industry was so good that about 20 million books appeared in the European markets in the second half of the fifteenth century. In the sixteenth century, this number went up to about 200 million copies.
Posted by Priyansh Nayak 5 years, 11 months ago
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Posted by Jawahar Lal Patel 5 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
The prevention of pregnancy in women (by preventing fertilisation) is called contraception. There are four methods of contraception:
- Barrier method: In barrier method of contraception, the physical devices such as condoms are used by males and females.
- Chemical method: In chemical methods of preventing pregnancy, the females use two types of pills – oral pills and vaginal pills.
- Intra-Uterine Contraceptive Devices – The use of intra-uterine contraceptive devices like Copper-T is very effective in preventing pregnancy. A Copper-T is placed inside the uterus by a doctor to prevent unwanted pregnancies.
Posted by Ruksar Ansari 5 years, 11 months ago
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Posted by Sharda Chouhan 5 years, 11 months ago
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Rutuja Taori 5 years, 11 months ago
Gunjan Kulhari 5 years, 11 months ago
Posted by Har Har Mahadev 🙏 5 years, 11 months ago
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Posted by Har Har Mahadev 🙏 5 years, 11 months ago
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Gunjan Kulhari 5 years, 11 months ago
Posted by Gunjan Kulhari 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
‘Accordion book’ was the traditional book of China.
It was folded and stitched at the side. This book was hand printed. Two features of hand printing in China
(i) From AD 594, books in China were printed by rubbing paper against the linked surface of woodblocks.
(ii) Superbly skilled craftsmen could duplicate with remarkable accuracy, the beauty of calligraphy.
Posted by Vijay Tamang 5 years, 11 months ago
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Anubhav Bhadani 5 years, 11 months ago
Posted by Darshan Bharwad 5 years, 11 months ago
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Posted by Vijay Tamang 5 years, 11 months ago
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Deepak Tewatia 5 years, 11 months ago
Posted by Rashi Sachdeva 5 years, 11 months ago
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Posted by Thor Odinson 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
Digital India will provide digital vaults (safes) for people to store their certificates online. Each person will have one unique private key, that will allow people access to their own documents. Applications will be made and processed online. The possibility of fake certificates will reduce and authenticity is improved.
Digital training on the technologies will be provided for achieving literacy in citizens. Mobile phones will be used as the personal identity for various transactions. People in rural or urban areas will have access to all digital services and the Internet of things on their mobiles or other gadgets.
Digital India will have more transparency in the processes and governance. It will eliminate a lot of cheating. The documents are also safe. This program will increase employment related to these technologies. A lot of activities will become automated, with quality of service improving. This program also will make Indians go to a higher level of literacy and technical skills.
Posted by Ayush Giri 5 years, 11 months ago
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Thor Odinson 5 years, 11 months ago
Posted by Kuldeep Bajpai 5 years, 11 months ago
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Ayush Giri 5 years, 11 months ago
Posted by Jitu Yadav 5 years, 11 months ago
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Posted by Chandan Kumar 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
Ferrous sulphate crystals contain water molecules as water of crystalisation - (FeSO4. 7H2O).
On heating, ferrous sulphate crystals lose water and anhydrous ferrous sulphate (FeSO4) is formed.
Due to this, it's colour changes from light green to white.
Cool Minded?? 5 years, 11 months ago
Aadya Singh ? 5 years, 11 months ago
Posted by Chandan Kumar 5 years, 11 months ago
- 2 answers
Yogita Ingle 5 years, 11 months ago
At a light intensity of about 1/30 of full sunlight, potassium and chloride ions move into the guard cells from surrounding tissue. Water follows by osmosis and, as the internal pressure rises, the guard cells bulge apart from each other, causing the stomata to open.
This allows the gas exchange required for photosynthesis to take place.
In darkness, leaving the stomata open might risk damage to the leaf by dehydration.
Posted by ?Sona ? 5 years, 11 months ago
- 2 answers
Yogita Ingle 5 years, 11 months ago
Money acts easier to exchange for goods and services:
- A person holding money can easily exchange it for any commodity or service that he or she might want.
- Everyone prefers to receive payments in money and exchange the money for things they want.
For example: A shoemaker wants to sell shoes in the market and buy wheat. The shoemaker will first exchange shoes for money and then exchange the money for wheat. If the shoemaker had to directly exchange shoes for wheat without the use of money. He would have to look for a wheat growing farmer who not only wants to sell wheat but also wants to buy the shoe in exchange. Both the parties have to agree to sell and buy each others commodities. This process is very difficult, time consuming and unhealthy.
Posted by Saniya Arif 5 years, 11 months ago
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Rishabh Gupta 5 years, 11 months ago
Cool Minded?? 5 years, 11 months ago
Posted by ___ Alone _____ 5 years, 11 months ago
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___ Alone _____ 5 years, 11 months ago
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