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Gaurav Seth 5 years, 6 months ago
The operating system is the most common type of system software.
Single-user, multi-tasking operating systems allow a single user to simultaneously run multiple applications on their computer. This is the type of operating system found on most personal desktop and laptop computers. Microsoft Windows, Mac OS, and Linux are three well-known examples of this type of system.
An operating system has three main functions: (1) manage the computer's resources, such as the central processing unit, memory, disk drives, and printers, (2) establish a user interface, and (3) execute and provide services for applications software.
Systems software includes the operating system and all the utilities that enable the computer to function. Applications software includes programs that do real work for users. For example, word processors, spreadsheets, and database management systems fall under the category of applications software.
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Meghna Thapar 5 years, 6 months ago
Very often, plants and animals that are tended by people become different from wild plants and animals. This is because people select plants and animals for domestication. For example, they select those plants and animals that are not prone to disease. They also select plants that yield large-size grain, and have strong stalks, capable of bearing the weight of the ripe grain. Seeds from selected plants are preserved and sown to ensure that new plants (and seeds) will have the same qualities.
Amongst animals, those that are relatively gentle are selected for breeding. As a result, gradually, domesticated animals and plants become different from wild animals and plants. For example, the teeth and horns of wild animals are usually much larger than those of domesticated animals.
Posted by Parray Touseef 5 years, 6 months ago
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Yogita Ingle 5 years, 6 months ago
Three points of difference between the lives of farmers/ herders from hunter-gatherers.
(a) Hunter-gatherers kept travelling from place to place whereas farmers had to live at same place for longer periods of time to take care of their crops.
(b) Hunter-gatherers depended on meat of wild animals whereas farmers and herders used plants, crops and cattle.
(c) Hunter-gatherers did not have any settled life whereas farmers and herders gradually settled in huts, pit-houses, etc.
Posted by Parray Touseef 5 years, 6 months ago
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Yogita Ingle 5 years, 6 months ago
- The Neolithic people used microlithic blades in addition to tools made of polished stones. They used stone hoes and digging sticks for digging the ground. They also used tools and weapons made of bone.
- The Paleolithic people used tools made from large and small scrapers, hammer stones, choppers, awls, etc. The tools were mainly used for cutting, digging, and skinning the prey and were less sharper as compared to the Neolithic tools.
Posted by Parray Touseef 5 years, 6 months ago
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Yogita Ingle 5 years, 6 months ago
1. Early human beings lived life as hunters and gatherers. Most people today do not hunt or grow their own food. They buy food from the market.
2. Early human beings lived a nomadic life while modern human beings live settled life.
3. Early human beings lived in tribes while modern human beings live as individual members in villages and cities.
4. Life for early human beings was harsh and brutal. They were in constant danger of being attacked by other tribes or by wild animals. Modern human beings do not face such dangers.
Posted by Parray Touseef 5 years, 6 months ago
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Meghna Thapar 5 years, 6 months ago
1)Some animals live in the home of men.These are called Domestic animals.
2)Man keep them for milk,food,hunting,riding and for many other purposes.
3)The cow,buffalo,horse,goat,sheep,etc.are some of the domestic animals.
4)The cow is most useful of all as it gives milk and milk is a good food and from that milk we produce butter,cheese,curd etc.,
5)Men keep buffaloes for milk and for drawing carts and ploughing the field.
6)The sheep is kept for its hair and flesh. The hair is made into wool. This wool is used in making warm clothes.
7)The horse is kept for riding.Some horses draw carts and carriages, plough the field and carry loads. Some horses are trained to run races. A race horse sometimes brings a large fortune to its master.
8)The dog is a very faithful animal friend to men. It guards the house of its master. It is used in hunting.Some dogs are trained to detect criminals.
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Yogita Ingle 5 years, 6 months ago
An integer is any whole mathematical number that is not a fraction. Integer can be a positive number, negative or zero.
The answer for the questions:
a) Sum of two numbers that gives an a negative integer:
3 + (-4) = -1
2 + (-5) = -3
4 + (-6) = -2
b) an integer smaller than both integers:
(-1) + (-1) = -2
(-2) + (-3) = -5
(-4) + (-7) = -11
c)An integer smaller than only one of the integers:
3 + (-2) = 1
1 + (-1) = 0
d) An integer greater than both integer:
1 + 2 = 3
4 + 6 = 10
3 + 5 = 8
7 + 2 = 9
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Sarthak Maurya 5 years, 6 months ago
1Thank You