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Ask QuestionPosted by Nithya Chinnu 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Biofuels are designed to replace gasoline, diesel fuel and coal, which are called “fossil fuels” because they are made from animals and plants that died millions of years ago. Biofuels are made mostly from plants that have just been harvested.
Posted by Shivansh Shukla 5 years, 4 months ago
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Posted by Shanthi Gowri 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Adolescence: The period of life, when the body undergoes changes, leading to reproductive maturity is known as adolescence.
• Generally, adolescence begins at the age of 11 and lasts upto 18 or 19 years of age. Adolescents are also called teenagers because they cover the period of the �teens� i.e. 13 to 18 or 19 years of age.
Posted by Mk Mk 5 years, 4 months ago
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Meghna Thapar 5 years, 3 months ago
Four ways for the judicious use of energy:
(a) The fossil fuels such as coal, petroleum, natural gas should be used only for the limited purposes when there is no other alternative source of energy available.
(b) The wastage of energy should be avoided.
(c) Efforts must be made to make use of energy for community or group purposes.
(d) The cutting of trees must be banned and more and more new trees must be roped to grow.
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Posted by Ishank Verma 5 years, 4 months ago
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Posted by Shubham Jain 5 years, 4 months ago
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Meghna Thapar 5 years, 3 months ago
- Sowing:
After the preparation of the soil, the seeds can be sown into it. The process of scattering seeds in the soil for growing the crop plants is called sowing. The good quality seeds are sown into the soil to obtain high yield. Seeds can be sown in the soil either by hand or using a seed drill.
- Traditional Tool: The tool used traditionally for sowing seeds is funnel shaped. The seeds are filled into the funnel, passed down through two or three pipes having sharp ends which pierce the soil and place seeds there.
- Sowing by hand: The sowing of seeds by hand is called broadcasting. The seeds are taken in hand and gradually scattered in the entire ploughed field. This method is not good as there is no proper spacing or proper depth at which the seeds are sown by hand. The seeds scattered on the surface of the soil for sowing can be picked up and eaten by birds.
- Seed Drill: It is an implement used for sowing seeds with the help of tractors. By using a seed drill, the seeds are sown at correct depth and correct intervals. The seeds sown with a seed drill are in regular rows and get covered by soil. This prevents the seeds to be picked up and eaten by birds.
Posted by Tony Starck 5 years, 4 months ago
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Subarna Das 5 years, 4 months ago
Posted by Aditya Sharma 5 years, 4 months ago
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Meghna Thapar 5 years, 3 months ago
Advantages of ploughing:
- The loose soil allows the plant roots to penetrate freely and deeper into the soil so that plants are held more firmly to the ground.
- The loose soil allows the roots of the plants to breathe easily.
- The loose soil helps in the growth of worms and microbes present in the soil as they help in turning and loosening of soil.
- Ploughing also uproots and buries the weeds standing in the field and thereby suffocates them to death.
- The loosening and turning of soil during ploughing brings the nutrient rich soil to the top so that the plants can use these nutrients.
Meghna Thapar 5 years, 3 months ago
Before sowing the seeds, it is necessary to loosen and turn the soil in the fields as to break it to the size of the grains which is done with the help of three main implements or tools – plough, hoe and cultivator.
Advantages of ploughing:
- The loose soil allows the plant roots to penetrate freely and deeper into the soil so that plants are held more firmly to the ground.
- The loose soil allows the roots of the plants to breathe easily.
- The loose soil helps in the growth of worms and microbes present in the soil as they help in turning and loosening of soil.
- Ploughing also uproots and buries the weeds standing in the field and thereby suffocates them to death.
- The loosening and turning of soil during ploughing brings the nutrient rich soil to the top so that the plants can use these nutrients.
Posted by Ishank Verma 5 years, 4 months ago
- 3 answers
Yogita Ingle 5 years, 4 months ago
Microbiology is the study of a great variety of living organisms which are invisible to the naked eye like bacteria and fungi and many other microscopic organisms. Although tiny in size these organisms form the basis for all life on earth. These microbes as they are also known as produce the soil in which plants grow and the atmospheric gases that both plants animals use. For about 3 billion years since the formation of earth microbes were the only lives on earth. Microorganisms have played a key role in the evolution of the planet earth.
Posted by Dushyant Gurjar 5 years, 4 months ago
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Muskan Taperwal 5 years, 4 months ago
Posted by Nithya Chinnu 5 years, 4 months ago
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Meghna Thapar 5 years, 4 months ago
A landslide is defined as the movement of a mass of rock, debris, or earth down a slope. The term "landslide" encompasses five modes of slope movement: falls, topples, slides, spreads, and flows. Landslides are part of a more general erosion or surficial process known as mass wasting, which is simply the downslope movement of earth or surface materials due to gravity. They are classified into four main types: fall and toppling, slides (rotational and translational), flows and creep.
Posted by Mahesh Hirani 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Biofuels are designed to replace gasoline, diesel fuel and coal, which are called “fossil fuels” because they are made from animals and plants that died millions of years ago. Biofuels are made mostly from plants that have just been harvested.
There are three main types of biofuel. Ethanol, biodiesel, and biojet fuel. Ethanol is used in engines that burn gasoline, like most cars. Biodiesel is used in engines that burn diesel fuel, like large trucks and tractors. Biojet fuel is used in planes.
Posted by Harshit Raj 5 years, 4 months ago
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Meghna Thapar 5 years, 4 months ago
Individual meat cuts such as steaks, chops, stewing meat, and ground meat should be kept covered on plastic or stainless steel trays at 2°C to 4°C (36°F to 39°F). Fresh seafood should be packed in ice, stored at –1°C to 2°C (30°C to 34°F) and used as soon as possible.
A general 'rule of thumb' is that cool season fruit and veg, such as kale and sprouts, should be stored at around 0-2°C. Warmer season fruit and veg, such a cucumber and tomato, is best stored around 7-10°C.
Posted by Nithya Chinnu 5 years, 4 months ago
- 3 answers
Yogita Ingle 5 years, 4 months ago
The rate of change of position of an object in any direction.
It is measured as the ratio of distance to the time in which the distance was covered. Speed is a scalar quantity as it has only direction and no magnitude.
Posted by Ishwari Bali 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
A seed is a basic part of any plant. The ovules after fertilization, develop into seeds. A seed is made up of a seed coat and an embryo. The embryo is made up of a radicle, an embryonal axis and one (wheat, maize) or two cotyledons (gram and pea). A seed is found inside a fruit which converts into a new plant when we plant it. Hence, the seed is the most important part.
Posted by Kaviya Kaviya 5 years, 4 months ago
- 1 answers
Yogita Ingle 5 years, 4 months ago
|
Prokaryotic Cell |
Eukaryotic cell |
|
Size is 0.1- 5.0 um |
Size is 5-100 um |
|
Nucleus is absent |
Nucleus is present |
|
Membrane bound nucleus absent. |
Membrane bound Nucleus is present. |
|
One chromosome is present, but not true chromosome plastids |
More than one number of chromosomes is present. |
|
Unicellular |
Multicellular |
|
Lysosomes and Peroxisomes absent |
Lysosomes and Peroxisomes present |
|
Microtubules absent |
Microtubules present |
Posted by Kaviya Kaviya 5 years, 4 months ago
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Posted by Raj Aggarwal 5 years, 4 months ago
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Posted by Red Bricks 5 years, 4 months ago
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Meghna Thapar 5 years, 2 months ago
PET, which stands for polyethylene terephthalate, is a form of polyester (just like the clothing fabric). It is extruded or molded into plastic bottles and containers for packaging foods and beverages, personal care products, and many other consumer products. PET is the acronym for a very versatile and sophisticated plastic called Polyethylene Terephthalate. For sound economic and safety reasons, it's the plastic used to make the most common container in the soft drink market today: the plastic bottle.
Posted by Nithya Chinnu 5 years, 4 months ago
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Shruti Dhua 5 years, 4 months ago
Posted by Karuna Bhati 5 years, 4 months ago
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Posted by Ishrat Bano 5 years, 4 months ago
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Ritesh Yadav 5 years, 4 months ago
Posted by Om Prakash Parida 5 years, 4 months ago
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Meghna Thapar 5 years, 4 months ago
The simplest and the easiest way of making a magnet is by the ‘stroking method’. If we stroke an iron bar with one end of the bar magnet repeatedly in the same direction, the iron bar becomes a magnet.
We can turn any iron or steel object into a magnet by the stroking method like a sewing needle, an iron nail or a razor blade.
Magnets can also be made by using electricity. Such magnets are called electromagnets.
Posted by Om Prakash Parida 5 years, 4 months ago
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Sachin Tendulkar 5 years, 4 months ago
Posted by Shivam Bopche 5 years, 4 months ago
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Posted by Radhamohan Saini 5 years, 4 months ago
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Posted by Lakshay Jain 5 years, 4 months ago
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Meghna Thapar 5 years, 4 months ago
DNA is composed of two complementary chains of nucleotides that form a double helix. This giant molecule is referred to as the molecule of heredity because it is responsible for passing on inherited traits. The chromosomes of a eukaryotic cell consist primarily of DNA attached to a protein core. They also contain RNA. The remainder of this article pertains to eukaryotic chromosomes. DNA packaging into chromatin and chromosomeDNA wraps around proteins called histones to form units known as nucleosomes.
Posted by Shanthi Gowri 5 years, 4 months ago
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Posted by Sinchana Rajesh 5 years, 4 months ago
- 4 answers
Shruti Dhua 5 years, 4 months ago
Posted by Aditya Sharma 5 years, 4 months ago
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Nithya Chinnu 5 years, 4 months ago
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