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Ask QuestionPosted by Hitansh Garg 7 years, 3 months ago
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Kashika Kashika 7 years, 3 months ago
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Tanya Pattnaik 7 years, 3 months ago
Posted by Hitansh Garg 7 years, 3 months ago
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Meghna Thapar 5 years, 6 months ago
In physics, magnitude means greatness of size or extent. A vector has a magnitude and a direction, its magnitude being the numerical value of its length, size or quantity. A scalar in physics is defined by magnitude or quantity and not by direction. An example of magnitude is the depth of the Grand Canyon. An example of magnitude is the size of the problem of world hunger.
Posted by Krutika Raipurkar 7 years, 3 months ago
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Yogita Ingle 7 years, 3 months ago
Algae: Algae are green plants which are simple in structure. A cell of algae contains cell wall and chloroplast. Algae are autotrophs. Some algae are microscopic. Examples: Chlamydomonas, Spirogyra, etc.
Fungi: Fungi have cell wall and nucleus in their cells but do not have chloroplast. Fungi are saprotrophs, i.e. they feed on dead remains of plants and animals. Almost all fungi are microscopic, except mushrooms. Examples: yeast, Rhizopus (bread mould), Aspergillus, Penicillium, etc.
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Ritik Dhakad 7 years, 3 months ago
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Yogita Ingle 7 years, 3 months ago
There are three parts of ear – the outer ear, middle ear and the inner ear. The outer ear consists of pinna and ear canal. The compressions in the air reach the outer ear called pinna which directs the sound to travel through the ear canal to reach the ear drum or tympanic membrane. Due to these compressions, the membrane starts vibrating. This thin membrane vibrates and relaxes depending on the amplitude of compression in air. The vibration is then passed to three bones in the ear connected to the ear drum: hammer, anvil and stirrup and is amplified about 20 times than the actual vibration.
Posted by Siya Gusain 7 years, 3 months ago
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Gaurav Kumar 7 years, 3 months ago
Soumya Pandey 7 years, 3 months ago
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Yogita Ingle 7 years, 3 months ago
The crude petroleum oil extracted from oil wells is taken to the oil refinery through pipes.In the oil refinery,crude petroleum is oil is refined into different useful fractions.
The separation of petroleum into different fractions is done by fractional distillation.The various useful fractions obtained by the refining of petroleum are: Petroleum gas, petrol, kerosene, diesel, lubricating oil,paraffin wax, Bitumen.
Posted by Niharika Singh Singh 7 years, 3 months ago
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Yogita Ingle 7 years, 3 months ago
Robert Clive, the governor of Bengal appointed native agencies who helped him collect the revenues on behalf of the Company. However, this system failed when Clive left India in 1767.
They hence forced the peasants to pay heavy dues as land taxes and forced artisans to sell their goods at very cheap rates. This drove the peasants and artisans away from their villages, which consequently led to a decline in the production of artisanal goods and agricultural crops. The economy of Bengal collapsed.
Bengal was struck by a terrible famine in 1770, which killed ten million people. The company therefore introduced many land revenue systems. In 1793, the Permanent Settlement system was introduced by Lord Cornwallis, the Governor-General of India.
Posted by Sakshi Bhokare 7 years, 3 months ago
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Posted by Rounak Ramteke 7 years, 3 months ago
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Roshan Raj 7 years, 3 months ago
Yogita Ingle 7 years, 3 months ago
Without a microscope, a cell can't be seen as cells are microscopic and can't be seen by naked eyes. You need a microscope to see microscopic materials. The cell was first discovered and named by Robert Hooke in 1665. He remarked that it looked strangely similar to cellula or small rooms which monks inhabited, thus deriving the name.
Posted by Dinesh Mangal 7 years, 3 months ago
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Posted by Rounak Ramteke 7 years, 3 months ago
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Yogita Ingle 7 years, 3 months ago
Function of cell wall: i) Gives shape and rigidity to cell.
(ii) It protects the protoplasm from
(iii) Helps to cell conduction of water and different chemical substances.
Function of cell membrane: (i) It give shape of the cell.
(ii) Protects the protoplasm and cell organelles.
(iii) Controls the transfer of food meterials and waste products inside and outside the cell.
Function of cytoplasm:: (i) Various cytoplasmic organelles, the nucleus and non-living cytoplasmic inclusions remain embedded in the cytoplasm.
(ii) The cytoplasm is the site of a number of chemical reactions which are essentials for life.
(iv) Frunction of Chromosomes: (i) Chromosomes are essential for the process of cell division, are responsible for replication, division, and creation of daughter cells which contain correct sequences of DNA and proteins.
(ii) Chromosomes are often called as the 'packaging material', because it tightly holds the DNA and proteins together in the eukaryotic cells.
Posted by Dinesh Mangal 7 years, 3 months ago
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Dinesh Mangal 7 years, 3 months ago
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Putani Spoorthy 7 years, 3 months ago
1Thank You