The grasslands (agricultural fields) especially of North America are called Prairies. The Prairies have unique characteristics of land, temperature and plants or vegetation.

The Prairies are known as the granaries of the world because of the huge production of wheat. The moderate temperature, moderate rainfall and fertile and humid soil in these prairies made them the largest producers of the wheat in the world. That is why they are known as the granaries of the world.

Phonetic spelling is a system of spelling in which each letter represents one spoken sound. In English, some words are pronounced exactly as they look. When T is used to spell tiger, the letter T is assigned one sound. So that single letter (T) does not correlate to only one pronunciation.

The essential functions of the cell include:

• The cell provides support and structure to the body.
• Facilitates growth by mitosis
• Helps in reproduction
• Provides energy and allows the transport of substances.

Aim: To separate healthy seeds from damaged (unhealthy seeds)

Materials: Seeds to be tested (mixture of healthy and damaged seeds), water, beaker

Procedure/Observation: Take some water in a beaker and add seeds to be tested to it. When seeds are poured in water, they begin to float. After few hours, mature viable seeds absorb water and sink to the bottom of the beaker. Empty, immature or damaged seeds and other light material remain floating and can be skimmed off after an appropriate period of time. In this way, healthy mature and viable seeds can be separated from damaged, immature and non-viable seeds.

James Mill (6 April 1773 – 23 June 1836) was a Scottish historian, economist, political theorist, and philosopher. He is counted among the founders of the Ricardian school of economics. His son, John Stuart Mill, was also a noted philosopher of liberalism, utilitarianism and the civilizing mission of the British Empire.

James Mill wrote the monumental work History of British India. He was the first writer to divide Indian history into three parts: Hindu, Muslim and British, a classification which has proved surpassingly influential in the field of Indian historical studies, but which is seen in recent decades as being deeply problematic.

James Rennell produced the first Indian map.Robert Clive had asked him to do so because he thought that to control a large territory like India they should know how does the country look like and how much area is occupied by it.

Rainbow Mountain has an elevation of 5200 meters above sea level, and is located approximately 100 km. southeast of the city of Cusco. Rainbow Mountain's close proximity to Cusco makes it the perfect day trip. Its formation is one of the most magnificent geological features in the world.

In 1817, James Mill, a Scottish economist and political philosopher, published a massive three-volume work, A History of British India . In this, he divided Indian history into three periods – Hindu, Muslim and British. This periodisation came to be widely accepted. However, it was later rejected by the nationalist historians.

Harvesting

• Harvesting is the process of cutting the mature crops, and it usually happens 3 to 4 months after sowing.
• The crops are either uprooted or cut close to the ground.
• The implements used for harvesting include the sickle (a short- handled farming tool with a circular blade), and  the harvester.
• Harvesting is followed by threshing, wherein the grain seeds are separated from the chaff (seed coat) using a combine. Separation may also be done by winnowing.

Exhaustible natural resources were formed from the dead remains of living organisms (fossils); therefore, these natural resources are also known as fossil fuels. E.g. coal, petroleum and natural gas.

• Food chain is a succession of organisms in an ecological community that constitutes a continuation of food energy from one organism to another as each consumes a lower member and in turn is preyed upon by a higher member.
• Food web is a complex network of many interconnected food chains.

Weeds are unwanted plants in the cultivated field. Example - Xanthium (gokhroo), Parthenium (gajar ghas), Cyperinus rotundus (motha).

Effects of weeds on crop plants:

1. The growth of weeds in the crop fields is harmful because they compete for food, space and light.
2. They take up nutrients and reduce the growth of the crop.
3. They spread crop pests and diseases by acting as alternate host to insects and microorganisms.
4. Some weeds may produce toxic substance which may interfere with the growth of crop plants.

Therefore, removal of weeds from cultivated fields during the early stages of crop growth is essential for a good harvest.

The process of removing the weeds from crop field is called weeding.

Methods of controlling weeds:

1. Mechanical methods: Weeds can be controlled by mechanical methods like uprooting or ploughing with trowel or khurpi.
2.  Chemical methods: They can also be controlled by using herbicides or weedicides. Some common weedicides are 2,4-D, Atrazine and Isoproturon.
3. Cultural methods: They include proper bed preparation, timely sowing of crops, intercropping and crop rotation.
4. Biological control: Biological control of weeds involves the deliberate use of insects or some other organisms which consume and specifically destroy the weed plants like eradication of Opuntia cactus by using the  cochineal insects in Maharashtra and Tamil Nadu.

Fungi include the yeasts, molds & mushrooms. There are a number of fungi that produce toxins that are extremely dangerous. Black molds growing on grains, and on damp surfaces in homes produce toxins that inhibit protein synthesis in eukaryotic cells. Ingestion of these grains can cause vomiting, nausea, and even death.

Commutative Property:
Addition. For any two rational numbers a and b, a + b = b+ a. 
Subtraction. For any two rational numbers a and b, a – b ≠ b – a. 
Multiplication. For any two rational numbers a and b, a × b = b × a. 
Division. For any two rational numbers a and b, a ÷ b ≠ b ÷ a.

Yes, the number 256 is a perfect square.

256 is a square of 16.

In short, the human resource department forms the crux of an organization that creates, implements and oversees policies between employees and the top management. The role of an HR is crucial because it talks about the most important resource – humans i.e. employees or talent in business parlance.

Resource conservation is management of the use of natural resources to provide the maximum benefit to current generation while maintaining capacity to meet the needs of future generations. Conservation includes both the protection and rational use of natural resources.

The average human body contains approximately 37.2 trillion cells. Cells are always created and destroyed in the human body. About 300 million cells die every minute in our bodies! Since different cells have different jobs in our body, there are about 210 different "types" of cells.