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Ask QuestionPosted by Ishika Choudhary 5 years, 2 months ago
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Posted by Yadav .K 5 years, 2 months ago
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Gaurav Seth 5 years, 2 months ago
Synthetic fibres have the following disadvantages.
- Most fabrics made from synthetic fibres require careful ironing as they melt easily.
- Most fabrics made from synthetic fibres absorb very little moisture. They become sticky when the body sweats, which makes them uncomfortable to wear in hot weather.
- Most fabrics made from synthetic fibres catch fire very easily. Therefore, it is dangerous to wear them near a source of fire (e.g., while working in the kitchen).
Haresh Belwal 5 years, 2 months ago
Posted by Divyanshi Singh 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
Reproduction in plants can be categorized into two types:
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Asexual Reproduction – The new plants are produced without using the seeds. In this process, generally, the leaves, stems and roots participate in reproduction.
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Sexual Reproduction – The new plants are produced with the help of the seeds of a plant. In this process, the flowers of the plants participate in reproduction.
Posted by Daksh Patel 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
Plasma membrane called a selectively permeable membrane because it regulates the movement of substances from within to outside of the cell. This means that the plasma membrane allows the entry of some substances while preventing the movement of some other substance.
Posted by Harmayni Granger 5 years, 2 months ago
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Hansika Singaria 5 years, 2 months ago
Posted by Veda Rane 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
PVC i.e, polyvinyl chloride is a synthetic polymer. Vinyl chloride polymerises in the presence of peroxides to give PVC.
Posted by Lovepreet Khattra 5 years, 2 months ago
- 6 answers
Vrinda Shandilya 5 years, 2 months ago
Vrinda Shandilya 5 years, 2 months ago
Pragya Jain 5 years, 2 months ago
Abc Def 5 years, 2 months ago
Veda Rane 5 years, 2 months ago
Gaurav Seth 5 years, 2 months ago
Undesirable plants that grow along with crop plants are known as weeds. Xanthium, Parthenium, etc. are some common weeds. Weeds compete with the crop for nutrients, light, and space. As a result, crop plants get lesser nutrients, light, and space for their development. This in turn, reduces their productivity. Thus, various weeding methods are employed.
Some important weeding methods are:
- Weeds can be controlled using weedicides. It is a chemical, which is sprayed in the fields to kill all available weeds. Weedicides are not harmful to crops.
- Tilling before sowing of crops also helps in removing weeds. Tilling uproots the weeds. The best time for the removal of weeds is before they produce flowers and seeds.
- The manual method of removing weeds is with the help of a khurpi. It involves regular uprooting or cutting of weeds close to the ground.
Posted by Ronit Chahar 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
Chemical properties of metal
- The density of metals is usually high.
- Metals are malleable and ductile.
- Metals form an alloy with other metals or non – metals.
- Some metals react with air and corrode. For e.g. Iron.
- Metals are good conductors of heat and electricity. Lead is an exception.
- Generally, metals are in a solid state at room temperature. Except for Mercury. Mercury is in a liquid state.
Chemical properties of Non-metal
- Nonmetals are poor conductors of heat and electricity. Graphite and Gas carbon are exceptions.
- Unlike metals, nonmetals aren’t malleable and ductile.
- Nonmetals react more with metals than with nonmetals.
- Usually, nonmetals react with other nonmetals in high temperature.
- Most nonmetals do not react with air in room temperature.
- White phosphorus is the only nonmetal that reacts with air to form its oxide by burning.
- Usually, nonmetals do not react with water. Except for Chlorine, chlorine dissolves in water to form an acidic solution.
Posted by Nibir Mahanta 5 years, 2 months ago
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Mishthy Gupta 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
Antigens are foreign pathogens that invade the body and have the capability to give rise to a response from our immunity system either by grouping up with a larger molecule or alone after binding with antibodies for a particular immune response. Hence, antigens stimulate the production of antibodies by the immune system.
The heavy chains of the antibodies contain a variable region and three constant regions. Each antibody has two identical antigen-binding sites and they differ in the antibodies.
Meghna Thapar 5 years, 2 months ago
Antibodies, also known as immunoglobulins, are Y-shaped proteins that are produced by the immune system to help stop intruders from harming the body. When an intruder enters the body, the immune system springs into action. These invaders, which are called antigens, can be viruses, bacteria, or other chemicals. An antibody (Ab), also known as an immunoglobulin (Ig), is a large, Y-shaped protein produced mainly by plasma cells that is used by the immune system to neutralize pathogens such as pathogenic bacteria and viruses. The production of antibodies is the main function of the humoral immune system.
Posted by Nibir Mahanta 5 years, 2 months ago
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Veda Rane 5 years, 2 months ago
Pragya Jain 5 years, 2 months ago
Vvg Vvg 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
Fermentation occurs in yeast cells and bacteria and also in the muscles of animals. It is an anaerobic pathway in which glucose is broken down. The processes that use an organic molecule to regenerate NAD+ and NADH are collectively referred to as fermentation.
Ronit Chahar 5 years, 2 months ago
Posted by Nibir Mahanta 5 years, 2 months ago
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Harmayni Granger 5 years, 2 months ago
Pragya Jain 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
Viruses are non-cellular, microscopic infectious agents that can only replicate inside a host cell. From a biological perspective, viruses cannot be classified either as living organism nor non-living. This is due to the fact that they possess certain defining characteristic features of living organisms and non-living entities.
Posted by Nibir Mahanta 5 years, 2 months ago
- 3 answers
Veda Rane 5 years, 2 months ago
Pragya Jain 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
Algae exist in environments ranging from oceans, rivers, and lakes to ponds, brackish waters, and even snow. Algae are usually green, but they can be found in a variety of different colours. For instance, algae living in snow contain carotenoid pigments in addition to chlorophyll, hence giving the surrounding snow a distinctive red hue.
Posted by Nibir Mahanta 5 years, 2 months ago
- 3 answers
Pragya Jain 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
Bacteria are unicellular organisms belonging to the prokaryotic group where the organisms lack a few organelles and a true nucleus.
The bacteria diagram given below represents the structure of bacteria with its different parts. The cell wall, plasmid, cytoplasm and flagella are clearly marked in the diagram.
Posted by Nibir Mahanta 5 years, 2 months ago
- 2 answers
Pragya Jain 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
i. Fungi are eukaryotic, non-vascular, heterotrophic organisms.
ii. They inhabit dark and damp habitats and grow in any direction.
iii. They feed on dead and decaying organic matter so they are considered as saprophytes.
iv. Their cell wall is made up of tough complex sugar called chitin.
Posted by Mishthy Gupta 5 years, 2 months ago
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Pragya Jain 5 years, 2 months ago
Veda Rane 5 years, 2 months ago
Posted by M M 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
The organisms belonging to the phylum Nematoda are also known as “roundworms”. There are 15000 species of Nematoda identified till date. They are unsegmented vermiform animals. The epidermis has dorsal and ventral nerve cords.
Following are the important characteristics of Nematoda:
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Their body is bilaterally symmetrical and triploblastic.
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They are cylindrical in shape.
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They exhibit tissue level organization.
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Their body has a cavity or pseudocoelom.
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The alimentary canal is distinct, with the mouth and the ****.
Posted by Riddhesh Patil 5 years, 2 months ago
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Ronit Chahar 5 years, 2 months ago
Mishthy Gupta 5 years, 2 months ago
M M 5 years, 2 months ago
Ansh Yadav 5 years, 2 months ago
Gaurav Seth 5 years, 2 months ago
Animal husbandry is the branch of agriculture dealing with feeding, caring and shelter of domestic animals.
Animals raised in animal husbandry include fish, cow, horse, buffalo, goat and camel.
Posted by T. Yashash Tej Thoudaboina 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
To test for hydrogen a small sample can be ignited. Hydrogen will make a squeaky pop when lit in air, care needs to be taken with this test as large amounts of hydrogen are very explosive in air.
Hydrogen reacts very quickly with oxygen to form water.
Posted by T. Yashash Tej Thoudaboina 5 years, 2 months ago
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Gaurav Seth 5 years, 2 months ago
A N S W E R :
Hydrogen gas is a gas of the lightest density so it a lightest gas and balloons filled with it floats because the hydrogen gas is lighter than air .
Posted by Ambika Singh 5 years, 2 months ago
- 2 answers
Harmayni Granger 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
- Weeding or weed control is the process of removing unwanted plants from crop fields.
- Here, physical, chemical and biological methods are used to stop weeds from reaching a mature stage of growth when they could be harmful to domesticated plants and livestock.
- Many weed control strategies have been developed in order to contain the growth and spread of weeds.
- The most basic is ploughing which cuts the roots of annual weeds.
- Other include, cultural, chemical and biological control.
- Weeding is essential weeds tend to compete with the crops for food, space, water and light and greatly reduce the crop yield.
Posted by G.Sri Charan 5 years, 2 months ago
- 2 answers
Samriddhi Tiwari 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia.
The second law explains how the velocity of an object changes when it is subjected to an external force. The law defines a force to be equal to change in momentum (mass times velocity) per change in time.
The third law states that for every action (force) in nature there is an equal and opposite reaction.
Posted by Saurabh Kaushik 5 years, 2 months ago
- 2 answers
Posted by Gursevak Randhawa 5 years, 2 months ago
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Samriddhi Tiwari 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
It is an acid-base reaction in which an acid reacts with a base to form salt and water. The pH of the neutralized solution depends upon the acid strength of the reactants and their concentrations. The neutralization reaction is best represented as:
Acid + Base → Salt + Water
Posted by Akshiii ?? 5 years, 2 months ago
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Pragya Jain 5 years, 2 months ago
Mishthy Gupta 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
One of the known asexual reproduction types is known by the name ‘fragmentation’. As the name is quite self-explanatory, it is a type of cloning where one organism is divided into minor fragments. Once divided, these fragments develop into individual ones which are fully grown.
Fragmentation, also known as a splitting method of reproduction and is seen in many organisms such as cyanobacteria, fungi, many plants, and also in animals including flatworms, sponges, some annelid worms and sea stars.
Posted by Laya Varshini 5 years, 2 months ago
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Pragya Jain 5 years, 2 months ago
Mishthy Gupta 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
Non living things are not alive. They do not possess life. They do not have cells and don’t grow or show locomotion/movement. They don’t undergo metabolism with anabolic and catabolic reactions. They do not reproduce.
Non living things do not have a life span. They do not respire as they do not require food for energy and hence do not excrete. They do not fall into any cycle of – born, grow, reproduce and die. They are destroyed or broken down by external force.
Examples of non living things include stone, pen, book, cycle, bottle, etc.
Posted by Gnanapoongothai S 5 years, 2 months ago
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Posted by V. Robhin Mitrakar 5 years, 2 months ago
- 2 answers
Gaurav Seth 5 years, 2 months ago
Manure is an organic substance that increases soil fertility. It is prepared from decomposition of animal excreta & plant wastes. It consists of Organic matter and nutrients essential for the plant. It improves the soil structure by increasing its water holding capacity, and also avoids water logging.
Some of the advantages of using manures are:
- Improves soil texture
- Restore soil with all nutrients
- Increases water-retaining capacity of soil
- Non-toxic
- Eco friendly
- Recycled biological product
Narendra Singh 5 years, 2 months ago
Posted by V. Robhin Mitrakar 5 years, 2 months ago
- 1 answers
Gaurav Seth 5 years, 2 months ago
Manure is an organic substance that increases soil fertility. It is prepared from decomposition of animal excreta & plant wastes. It consists of Organic matter and nutrients essential for the plant. It improves the soil structure by increasing its water holding capacity, and also avoids water logging.
Some of the advantages of using manures are:
- Improves soil texture
- Restore soil with all nutrients
- Increases water-retaining capacity of soil
- Non-toxic
- Eco friendly
- Recycled biological product
Posted by Jenish Patel 5 years, 2 months ago
- 1 answers
Yogita Ingle 5 years, 2 months ago
The type of reaction in which an atom or group of atoms (radical)present in a molecule of the chemical compounds is displaced by another atom or a group of atoms (radical)is called displacement reaction.
Displacement reaction is of two types ;(1) Single displacement reaction and
(2)Double displacement reaction
For ex:Zn + H2SO4 → ZnSO4 +H2
Posted by Jenish Patel 5 years, 2 months ago
- 1 answers
Yogita Ingle 5 years, 2 months ago
| Fertilizer | Manure |
| It may be artificial or natural substance. | It is a natural substance. |
| These are chemicals that are added to the soil to increase its fertility and productivity. | These are obtained by dead and decaying plants and animals. |
| Prepared in factories. | Prepared in fields. |
| Does not provide humus to the soil. | Provides humus to the soil. |
| Rich in plant nutrients. | Less rich in plant nutrients. |
| Absorbed by plants quickly. | Absorbed by plants slowly. |
| Costly | Cost-effective |
| It harms the organisms present in the soil and also causes health issues in people consuming the crop. | It causes no harm to the organisms and improves soil quality. |
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Meghna Thapar 5 years, 2 months ago
In 1913, Henry Moseley proved that the atomic number is the fundamental property rather than its atomic mass.
Modern Periodic Law: Properties of elements are a periodic function of their atomic numbers.
The periodic table, based on the Modern Periodic Law is called the Modern Periodic Table.
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