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Ask QuestionPosted by Sohini Dutta 5 years, 8 months ago
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Ashok Yadav 5 years, 8 months ago
Posted by Eniyadarshini Udayalikumar 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
When solution of barium chloride reacts with the solution of sodium sulphate, white precipitate of barium sulphate is formed along with sodium chloride.
<i>BaCl2 + Na2SO4 </i>→ <i>BaSO4 + 2NaCl</i>
When sodium hydroxide (a base) reacts with hydrochloric acid, sodium chloride and water are formed.
<i>NaOH + HCl </i>→<i> NaCl + H2O</i>
Posted by Muskan Bano 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Potential difference is nothing but voltage and is measured by a device called Voltmeter. It is always connected in parallel across the points whose potential difference is to be measured.
- SI unit of electric potential difference is Volt (V).
- SI unit of Work done is Joule (J).
1 V = 1 J/ 1 C, potential difference is 1 when 1 joule work is done to move 1 coulomb of charge from one point to another
Posted by Dhruv .. 5 years, 8 months ago
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Posted by Mohit Saini 5 years, 8 months ago
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Manchal Meena 5 years, 8 months ago
Posted by Ayush Tripathy 5 years, 8 months ago
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Shreya _S❤ 5 years, 8 months ago
Shreya _S❤ 5 years, 8 months ago
Posted by Arul Tyagi 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Amoeba is a holozoic and protozoan. The digestion is intracellular as it is a unicellular organism. The food taken remains in a food vacuole or gastric vacuole formed by the cell membrane and a bit of the cytoplasm. The vacuoles are transported deeper into the cells by cytoplasmic movements. Here they fuse with lysosomes that contain enzymes such as amylase and proteinase. Thus, amoeba can digest sugar, cellulose and protein. Fats, however, remain undigested.
Nutrition in Amoeba:-
Food - Amoeba is a holozoic and omnivorous animal. It feeds upon microscopic organisms like bacteria, Paramecium, Diatoms, Algae and dead organic matter.
Nutrition in Amoeba involves the following steps:
(i) Ingestion:- Amoeba has no mouth so ingestion may occur at any point of body surface but generally it occurs at the advancing end of the body. Ingestion occurs with the help of pseudopodia. The opening of food cup gradually becomes narrower and narrower, and finally closes. So the food is finally enveloped and taken inside a food-vacuole (called phagosome) along with a drop of water.
(ii) Digestion:- Amoeba shows intracellular and vacuolar digestion. In the cytoplasm, food vacuole fuses with lysosomes containing digestive enzymes. In this, the complex and non-diffusible nutrients are changed into simple and diffusible nutrients. Medium inside the food vacuole is first acidic but later becomes alkaline, (as in the alimentary canal of man).
(iii) Absorption:_ In absorption, the diffusible nutrients pass through the vacuolar membrane into the cytoplasm by diffusion and are then distributed to all the body parts by streaming movements of cytoplasm called cyclosis. Due to this, the size of food vacuole gradually decreases.
(iv)Assimilation: In the cytoplasm, a part of the absorbed food is oxidised to produce energy, most of the simple nutrients are combined to synthesise complex compounds. Thus, the absorbed food materials are utilised to get energy through respiration and make the different parts of Amoeba cell and it leads to the growth of Amoeba.
(v) Egestion: Egestion may occur at any point on the body surface.
Neeta Saini 5 years, 8 months ago
Posted by Jothijayalal Jothijayalal 5 years, 8 months ago
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Posted by Jothijayalal Jothijayalal 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Potential Difference = Work done / Charge
V = W / Q
GIVEN
Potential Difference = 6V
Work Done = Energy = W
Charge Q = 1C
∴ Potential Difference = Work done / Charge
V = W / Q
6V = W / 1
6*1 = W
Work = Energy = 6 J
Posted by Akhil? . 5 years, 8 months ago
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Akhil? . 5 years, 8 months ago
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Akhil? . 5 years, 8 months ago
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Akhil? . 5 years, 8 months ago
Akhil? . 5 years, 8 months ago
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Akhil? . 5 years, 8 months ago
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Akhil? . 5 years, 8 months ago
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Akhil? . 5 years, 8 months ago
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Akhil? . 5 years, 8 months ago
Posted by Pratik Kumar Meher 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
The mechanism of urine formation takes place in following steps-
(i) Ultrafiltration- All the blood components are filtered by the kidneys except for the blood cells and the plasma proteins, e.g. urea, water, sodium, glucose, potassium,etc.
(ii) Selective reabsorption- The essential components are reabsorbed back into the blood vessels, e.g. glucose, water, sodium, etc.
(iii) Secretion- The movement of elements such as water, glucose, amino acids, urea etc from the blood into the nephron is known as secretion. For example, potassium ions and hydrogen ions are secreted by distal
convoluted tubule (DCT) and uric acid and other toxic chemicals secreted by proximal convoluted tubule (PCT)
iv) Then the water reabsorption content is further regulated before coming out of the kidney through a hormone, anti-diuretic hormone (ADH).
(v) Urine is then formed, collected in the bladder and excreted outside the body.
Posted by Vaseegaran Sharma 5 years, 8 months ago
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Meghna Thapar 5 years, 8 months ago
The differences between male and female sexes are anatomical and physiological. “***” tends to relate to biological differences. For instance, male and female genitalia, both internal and external are different. However, women have higher levels of estrogen and progesterone, and men have higher levels of testosterone.
Posted by Ritik Tomar 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Villi refers to the numerous finger like projections on the inner wall of small intestine which help in the absorption of digested nutrients into circulatory system by increasing the surface area of absorption. Each villus has a lymph vessel and a blood vessel, out of which fatty acids and glycerols are absorbed in lymph while glucose and amino acids are absorbed in the blood.
Diksha? 5 years, 8 months ago
Posted by Nishant Borgade 5 years, 8 months ago
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Arghadeep Nag 5 years, 8 months ago
Posted by Shiven Kumar 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
Bodies in which the application of an electric field results in the generation of an electric current due to the movement of the electrons is called an Electrical Conductor. In such bodies, the electrons are free to move around inside the body and their random motion can be influenced by an electric field. Most electrical conductors are metals mainly because metals possess electrons in the outermost orbit where they are most loosely held and can move around easily. The wires supplying electricity to your houses are supplying fresh energetic electrons to your house for you to use. We have learn’t to use it and we have become completely dependent on electricity.
Posted by Meena Pradhan 5 years, 9 months ago
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Posted by Meena Pradhan 5 years, 9 months ago
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Abhay Sahani 5 years, 9 months ago
? Royal Thakur ? 5 years, 9 months ago
Posted by Shivam Patel 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
Life processes – The processes that are necessary for an organism to stay alive. Eg. Nutrition,respiration, etc.
Nutrition- The process in which an organism takes in food, utilizes it to get energy, for growth, repair and maintenance, etc. and excretes the waste materials from the body
Transportation
Transportation and transportation system in plants and animals are entirely different. In animals, transportation is carried out through the circulatory system. This system includes the heart, blood, and blood carrying blood vessels.
Metabolism
Metabolism is the chemical process in which different types of chemical reactions involved in controlling the living state of the cells in an organism. It is broadly classified into catabolism and anabolism.
Respiration
Respiration includes the exchange of gases as well as the burning of food. Animals have a well defined respiratory system for respiration.
Reproduction
The biological process of reproducing their own offspring determines the continuity of species, generation after generation. The basic types of reproduction are sexual and asexual reproduction.
Excretion
Elimination of toxic waste substances from the body is called excretion. There are various modes of excretion and it generally differs with the different types of living species.
Diksha? 5 years, 9 months ago
Posted by Sharik Bhat 5 years, 9 months ago
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Diksha? 5 years, 9 months ago
Posted by Sanket Arjun 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
| Displacement reaction | Double displacement reaction |
| In a displacement reaction, a more reactive element replaces a less reactive element from a compound. | In a double displacement reaction, two atoms or a group of atoms switch places form new compounds. |
| In a displacement reaction, one displacement takes place.
A + BX → AX + B |
In a double displacement reaction, two displacements take place to complete the reaction.
AB + CD → AC + BD |
| Change in colour takes place with no precipitate forms. | Precipitate is formed. |
| Metals react with the salt solution of another metal. | Salt solutions of two different metals react with each other. |
| Examples:
2KI + Cl2 → 2KCl + I2 is a displacement reaction. CuSO4 + Zn → ZnSO4 + Cu is also a displacement reaction. |
Examples:
Na2SO4 + BaCl2 → BaSO4 + 2NaCl is a double displacement reaction. 2KBr + BaCl2 → 2KCl + BaBr2 is also a double displacement reaction. |
Priyanshi .. 5 years, 9 months ago
Posted by Varun Jakhar 5 years, 9 months ago
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Posted by Pawan Deswal 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
A weak force of attraction between electrically neutral molecules that collide with or pass very close to each other. The van der Waals force is caused by the attraction between electron-rich regions of one molecule and electron-poor regions of another (the attraction between the molecules seen as electric dipoles). The attraction is much weaker than a chemical bond. Van der Waals forces are the intermolecular forces that cause molecules to cohere in liquid and solid states of matter, and are responsible for surface tension and capillary action.
Posted by Riya . 5 years, 9 months ago
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Varun Jakhar 5 years, 9 months ago
Posted by Dhruv ... 5 years, 8 months ago
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?? ᴳᵒᵈ᭄★ค๓Ar࿐?? 5 years, 9 months ago
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Amrit Ranjan 5 years, 8 months ago
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