Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by P.Ramesh Babu 6 years, 4 months ago
- 1 answers
Posted by Anu Nagar 6 years, 4 months ago
- 3 answers
Posted by Anu Nagar 6 years, 4 months ago
- 1 answers
Meghna Thapar 5 years, 10 months ago
Guard cells are kidney shaped structures or bean shaped structures that surround a stoma and play an important role in gaseous exchange.
Posted by Anu Nagar 6 years, 4 months ago
- 1 answers
Meghna Thapar 5 years, 10 months ago
Cell wall is mainly composed of cellulose. Cellulose is a complex substance and provides structural strength to plants.
Posted by Anu Nagar 6 years, 4 months ago
- 2 answers
Posted by Talha Gazali 6 years, 4 months ago
- 2 answers
Gurleen Kaur 6 years, 4 months ago
Yogita Ingle 6 years, 4 months ago
Formation of Coal:
- Coal was formed by the decomposition of large land plants and trees buried under the Earth about 300 million years ago.
- About 300 million years ago, the Earth had dense forests in the low lying wet areas.
- Due to natural calamities like earthquakes, volcanoes, floods, etc. these forests got buried under the surface of the Earth.
- As more soil got deposited on them, they were compressed.
- As a result, the temperature also rose as they sank deeper and deeper.
- Due to high pressure and temperature and the absence of air, the wood of the buried forest plants and trees slowly got converted into coal.
- The slow process by which the dead plants buried under the Earth have become coal is called as carbonisation.
- Since coal was formed from the remains of the plants, it is called a fossil fuel.
- Coal, which is mainly carbon, on heating produces mainly carbon dioxide gas and a lot of heat energy.
Posted by Laxman Sahu 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
Coal: Coal is a fossil fuel. It is hard as stone, black in colour and is mainly composed of carbon.
Carbonisation: The process of conversion of vegetation into coal is called carbonization. The buried plants underwent carbonization and changed into coal.
Posted by Badal Naik 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
The advantages of using compressed natural gas (CNG) :
- They can be burnt directly.
- They can be transported easily through pipelines.
- They are clean fuels and do not give smoke when burnt.
- They give a lot of heat energy when burnt.
Posted by Rytham Kapoor 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
Pregnancy occurs when the sperm fertilizes the egg, and the zygote is formed. The zygote gets implanted in the wall of the uterus. As soon as the implantation takes place, the need for nourishment and care arises as the growth of the zygote develops into an embryo which further grows into a baby. This responsibility is taken up by a layer formed between the baby and the mother, called the placenta. The placenta is formed by finger-like projections called chorionic villi and the uterine tissue.
Posted by Haojam Rodi Miranda 6 years, 4 months ago
- 1 answers
Posted by Deepanshu Verma 6 years, 4 months ago
- 1 answers
Posted by Hajara Begam 6 years, 4 months ago
- 1 answers
Rytham Kapoor 6 years, 4 months ago
Posted by Manorama Gupta 6 years, 4 months ago
- 1 answers
Meghna Thapar 5 years, 10 months ago
i. Aspergillosis – It is a fungal disease in animals.
ii. Rust of wheat – It is caused by fungi. It is transmitted through air and seeds. It occurs in wheat plants.
Posted by Saurav Kumar 6 years, 4 months ago
- 2 answers
Lokanath Reddy 6 years, 4 months ago
Posted by Vedant More 6 years, 4 months ago
- 2 answers
Posted by Pankaj Malviya 6 years, 4 months ago
- 3 answers
Tanmay Tehra 6 years, 4 months ago
Yogita Ingle 6 years, 4 months ago
Following are the conditions under which combustion can take place:
- Presence of oxygen
- Presence of inflammable substance
- Ignition temperature
Posted by ՖυϻเϮ Vεrϻa 6 years, 4 months ago
- 2 answers
Yogita Ingle 6 years, 4 months ago
Terylene is an artificial textile fibre made from polyester, it is used to make light, crease-resistant clothing, bed linen, and sails.
Posted by Puneet Kaur Puneet 6 years, 4 months ago
- 1 answers
ՖυϻเϮ Vεrϻa 6 years, 4 months ago
Posted by Neeraj Singh 6 years, 4 months ago
- 1 answers
Meghna Thapar 5 years, 10 months ago
A percussion instrument can be any object which produces a sound by being struck, shaken, rubbed, and scraped with an implement, or by any other action which sets the object into vibration. Examples - xylophone, drum sticks, bass drum, etc.
Posted by Priyanshu Sahani 6 years, 4 months ago
- 2 answers
Posted by Suresh Solanki 6 years, 4 months ago
- 4 answers
Lagan Mahajan 6 years, 4 months ago
Yogita Ingle 6 years, 4 months ago
Habitats: Habitats or isolation sources of organisms, such as those stored in the GOLD database, are tagged1. If they are context-related or can be referred to as a habitat or isolation source ofan organism. For example, if they refer to a host organism (human, cow), a bodypart or organ of a host organism (lung, gut,lung abscess), refer to an environmentalhabitat (mine tailing, wastewater), or employ the adjectival forms of habitats listedabove (bovine, pulmonary, rumen).2. If they are not associated directly with disease e.g. diarrhea, respiratory tract infection.3. If they are in sentences, which contain the organism associated with the habitat.
Sudha Kumari 6 years, 4 months ago
Posted by Ramneek Kaur 6 years, 4 months ago
- 0 answers
Posted by Ramneek Kaur 6 years, 4 months ago
- 0 answers
Posted by Shubham? Sahani 6 years, 4 months ago
- 3 answers
Lagan Mahajan 6 years, 4 months ago
Posted by Shubham? Sahani 6 years, 4 months ago
- 2 answers
Posted by Gurnoor Kaur 6 years, 4 months ago
- 5 answers
Chandra Kant 6 years, 4 months ago
Lagan Mahajan 6 years, 4 months ago
Posted by Gurdeep Singh 6 years, 4 months ago
- 1 answers
Sudha Kumari 6 years, 4 months ago
Posted by Aishi Banerjee 6 years, 4 months ago
- 1 answers
Meghna Thapar 5 years, 10 months ago
The sounds having too high frequencies which cannot be heard by human ear are called ultrasonic sounds. Bat produces ultrasonic sound during screaming so we cannot hear its sound.
Posted by Aditya Jangra 5 years, 8 months ago
- 4 answers
Lokanath Reddy 6 years, 4 months ago
Posted by Yukta'S Art 6 years, 4 months ago
- 3 answers
Yogita Ingle 6 years, 4 months ago
Paddy plants requires lot of water for their proper growth and development, thus paddy can be grown in rainy season only and not in winter season
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
Yogita Ingle 6 years, 4 months ago
The Resultant force is defined as the total force acting on a body along with their directions. When the object is at rest or travelling with the same velocity, the resultant force has to be zero. Since all the forces are acting towards the same direction, the resultant force should be same for all the forces.
If one force is acting perpendicular to another, the resultant force is determined by using Pythagorean theorem.The Resultant force formula is given by,
FR = F1 + F2 + F3
Where,
F1, F2, F3 are the forces acting in the same direction on a body.
0Thank You