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Ask QuestionPosted by Manju Kharayat 6 years, 7 months ago
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Om Prakash Parida 6 years, 7 months ago
Posted by Divij Jain 6 years, 7 months ago
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Meghna Thapar 5 years, 10 months ago
The speed of an object gives an idea of how slow or fast that object is moving. The speed of an object is the distance travelled by it in unit time. The speed of an object can be calculated by dividing the distance travelled by the object by the time taken to travel this distance. The most convenient way to find out which of the two or more objects is moving faster is to compare the distances moved by them in a unit time. A car is moving with a speed of 50 kilometres per hour, it implies that it will cover a distance of 50 kilometres in one hour.
Speed = Total distance covered/ Total time taken
It actually gives the average speed of the car during that time. While travelling in a car or bus we have noticed that it is very difficult to keep the speed of the car at a constant value because at many places the places are to be applied to slow down or stop the car due to various reasons.
Posted by Komal Sharma 6 years, 7 months ago
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Posted by Komal Sharma 6 years, 7 months ago
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Anirudh Tyagi 6 years, 7 months ago
Yogita Ingle 6 years, 7 months ago
Some plants eat insects. Such plants are called insectivorous plants. They trap and digest the insects. Pitcher plant is the example of an insectivorous plant.
Posted by Raj Gupta 6 years, 7 months ago
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Yogita Ingle 6 years, 7 months ago
Saliva is a digestive that is secreted from the salivary glands. Saliva contains pytalin for the breaking down of carbohydrates.
Posted by Love Chaudhary 6 years, 7 months ago
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Meghna Thapar 5 years, 10 months ago
Parasitic nutrition: It is that nutrition in which an organism derives its food from the body of another living organism (called its host) without killing it. Hence, host is an organism on which a parasite lives.
Example: Plasmodium, round worms and Cuscuta obtain food by parasitic nutrition.
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Yogita Ingle 6 years, 7 months ago
Germination is the process which involves the emergence of a plant from the seed when proper temperature, humidity and sunlight are provided.
All the abiotic factors bringing about the process of germination are called as favourable conditions of the environment. Different types of germination are epigeal germination, hypogeal germination etc.
Posted by Harsh Chhabra 6 years, 7 months ago
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Yogita Ingle 6 years, 7 months ago
The organisms which exhibit saprotrophic mode of nutrition are called as saprotrophs. Saprotrophs obtain their nutrition from dead and decaying organic matter. Saprotrophs secrete digestive juices onto dead and decaying matter to dissolve it and then absorb nutrients from it. Fungi are saprotrophs. Rhizopus, asperigillus, mushrooms are some of the examples of saprotrophs. These are organisms grow and depend on dead and decaying matter.
Posted by Hetasvi Patel 6 years, 7 months ago
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Hanshika Rawat 5 years, 7 months ago
Posted by Sam Madan 6 years, 8 months ago
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Yogita Ingle 6 years, 7 months ago
Procedure: 1. Take the conical flask and place some germinating gram or pea seeds in it.
2. Insert the shorter end of the glass tube through the hole in the cork and fix it on the conical flask.
3. Before fixing the cork, hang a test tube containing KOH solution inside the conical flask with the help of a thread.
4. Take coloured water in the beaker and keep the longer end of the glass tube dipped inside it.
5. Make the conical flask airtight by applying Vaseline on its rim.
6. Note the initial level of water in the tube.
7. Observe and note the rise in the water level after an hour, without disturbing the apparatus.
Observations:Water level rises up in the bent tube.
Result: The rise in the level of water indicates that CO2 is produced by germinating seeds during respiration. Actually, the germinating seeds respire and produce CO2, which is absorbed by KOH solution. This creates a vacuum in the conical flask. The air present in the bent glass tube moves into the conical flask. This pulls the water in the bent tube further up.
Posted by Csk Blaster 6 years, 8 months ago
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Yogita Ingle 6 years, 7 months ago
Teeth: Our teeth cut, tear and grind the food before we swallow it. There are four types of teeth in our mouth.
- Incisors: These are flat and chisel-shaped teeth. They lie in the front of the mouth. There are eight incisor teeth; four in the upper jaw and four in the lower jaw. The incisor teeth are well adapted for cutting and biting of food items.
- Canines: These are round shaped, sharp and pointed teeth. Canines are well adapted to hold and tear the food. There are four canine teeth found in human.
- Premolars: There are two premolars on each side of each jaw. Premolars help in crushing and grinding the food. There are 8 premolar teeth in an adult human.
- Molars: There are two molars on both sides in both the jaws. They have almost a flat surface with small projections. These teeth are meant for fine grinding of food.
Posted by Manoj Panwar 6 years, 8 months ago
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Meghna Thapar 5 years, 10 months ago
Balancing the Chemical Equations:
- In a balanced chemical equation, the total number of atoms of each element of the reactants on the left hand side of the equation is equal to the number of atoms of the products formed on the right hand side of the equation.
- The total mass of the reactants is equal to the total mass of the products or the number of atoms of each element before the reaction and after the reaction is equal.
Posted by Sona Mulchandani 6 years, 8 months ago
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Divyansh Jain 6 years, 8 months ago
Yogita Ingle 6 years, 8 months ago
There are two modes of nutrition
- Autotrophs or Autotrophic: - In this mode of nutrition organisms make their food themselves from simple substances. All green plants are Autotrophs (Auto means self and trophos means nourishment)
- Heterotrophs or heterophobic: - Heterotrophic organisms are those who obtain food from other organisms. Since these organisms depend on other organisms for their food, they are called consumers. All animals and non-green plants like fungi come under this category.
Posted by Bhavna Khanna 6 years, 8 months ago
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Yogita Ingle 6 years, 8 months ago
Convection is the transfer of heat by the movement of particles of a medium from one place to another. It takes place only in liquids and gases.
Examples of convection are wind currents, the lower floor of a building is cooler than the upper floor, and water is warmer at the surface of a swimming pool or lake. Due to convection, the atmosphere at the sea shore is always pleasant.
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