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NCERT solutions for class 10 science chapter 6 Life Processes

The NCERT Solutions for class 1 to dhapter 12 has been written so as to help the understudies in all the degree of evaluations. We have given nitty gritty answers for all the inquiries keeping the stamping plan for each question.

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The questions given within NCERT solutions are very diversified and represent almost the entire chapter, so all children should read them very carefully. Student should do deep analysis of solutions for 10tg 9 to 12 specially. You can read these solutions offline and score very good marks. Copyright ncerthelp. Follow Us On Facebook.

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The digested food diffuses into the cytoplasm and undigested food is thrown out through the pore. Emulsification means a fine dispersion of one liquid in another. In reference to digestion of food, breakdown of large fat globules in the small intestine by the bile juice from liver into fine smaller fat globules so to increase the efficiency of enzyme action, is called emulsification.

Differentiate between Inhalation and Exhalation. Answer 1: The blood brings CO2 form the body parts to be released into the alveoli, and the oxygen in the alveolar cavity is taken up in the alveolar blood vessels to be transported to all the cells in the body.

This forms the breathing cycle taking in air and given out air is rhythmic. But during breathing cycle, when air is taken in and let out. The lungs always contain a residual volume of air. So that there is sufficient time for oxygen to be absorbed and for the carbon dioxide to be released. Thus, there is some gap in between inspiration taking in air and expiration given out air during breathing cycle but exchange of gases continuous. Question 2: What are the basic materials used during photosynthesis?

Write chemical equation for photosynthesis. Answer 2: Materials used in photosynthesis are a Carbon Dioxide and b Water. Chemical equation of photosynthesis. Question 1: Explain the process of nutrition in amoeba with the help of diagrams. Answer 1: Engulfing of Food: Amoeba obtains food by phagocytosis a type of holozoic nutrition.

Amoeba engulfs the food by forming pseudopodia. Two pseudopodia start growing from opposite sides of food particle. They completely encircle the food and their lips touch each other. The membranes of both the pseudopodia dissolve at the point of touching and the food is encaptured into the Amoeba one cell body in a bag known as food vacuole.

Digestion of food: Inside the food vacuole, complex substances of the food are broken down into simpler ones. The digested simple substances diffuse from food vacuole into cytoplasm. The remaining undigested material is moved near the surface of the single-celled body of amoeba and thrown out.

Example of other unicellular organisms are Paramoecium and Euglena. Pseudopodia also help amoeba in locomotion. Question 2: a Where are salivary glands located in human beings? State the role of saliva in the digestion of food. Answer 2: Salivary glands secrete their secretion called saliva in the mouth cavity.

There are three pairs of salivary glands located in the mouth. Saliva Amylase enzyme. Role Or Function of saliva: 1. Saliva moisten the food thus help in chewing of food by the teeth.

Human saliva contains an enzyme called salivary amylase that converts starch into maltose a sugar. Saliva also helps in swolling and passage of food chewed food through the food canal which has soft lining. Thus, it is necessary for them to separate oxygenated and de-oxygenated blood, so that their circulatory system is more efficient and can maintain their constant body temperature.

Some finger like projection are present in the inner wall of small intestine. Write their name. Why are they important? Which is the internal energy reserve in plants?

Do the animals have the same energy reserve? Justify your answer. What are nutrients? Explain the structure of stomata. Write functions of guard cells. Write major functions of stomata present in the epidermis. Stomata remains closed during the day in desert plants.

How they get carbon dioxide for photosynthesis? Explain parasitic mode of nutrition with two examples. How does nutrition takes place in Paramoecium? What is emulsification? Important Questions on 10th Science Chapter 6 How are fats digested in our bodies? Where does this process take place? Fats are present in the form of large globules in the small intestine. The small intestine gets the secretions in the form of bile juice and pancreatic juice respectively from the liver and the pancreas.

The bile salts from the liver break down the large fat globules into smaller globules so that the pancreatic enzymes can easily act on them.

This is referred to as emulsification of fats. It takes place in the small intestine. What is the role of saliva in the digestion of food? Saliva is secreted by the salivary glands, located under the tongue.

It makes the food soft for easy swallowing. It contains a digestive enzyme called salivary amylase, which breaks down starch into sugar.

How are the alveoli designed to maximise the exchange of gases? The alveoli are the small balloon-like structures present in the lungs. The walls of the alveoli consist of extensive network of blood vessels.

The alveolar surface when spread out covers about 80 m2 area. This large surface area makes the gaseous exchange more efficient. What would be the consequences of a deficiency of haemoglobin in our bodies? Haemoglobin is the respiratory pigment that transports oxygen to the body cells for cellular respiration. Therefore, deficiency of haemoglobin in blood can affect the oxygen supplying capacity of blood. This can lead to deficiency of oxygen in the body cells.

It can also lead to a disease called anaemia. Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans? In multi-cellular organisms, all the cells may not be in direct contact with the surrounding environment.

Thus, simple diffusion will not meet the requirements of all the cells. Chapter 4 of Class 10 Science, covers deals with versatile properties of carbon, Catenation and Tetravalency. Carbon compounds with straight chains branched chains or rings.

Knowledge about homologous series of compounds and functional group attached to carbon chains such as alcohols, aldehydes, ketones and carboxylic acids. Preparation of Ethanol with proper Chemical Reactions and properties of Ethanol and ethanoic acid, The action of soaps and detergents with the concepts of hydrophilic or hydrophobic groups.

Class 10 Science Chapter 5 is based on how elements are classified on the basis of similarities in their properties. Modern periodic table proposed by Henry Moseley. Physical and chemical properties trends in the modern periodic table.

We have to learn about Periodicity which is the properties including atomic size, valency as well as combining capacity and metallic and non-metallic character. Life processes include the main four processes like Nutrition, Digestion, Respiration and Excretion. We know that maintenance of life requires these processes to transport of materials within the body and excretion of waste products. Autotrophic nutrition and Heterotrophic nutrition both describe separately.

In human beings, the food eaten is broken down by various steps along the alimentary canal and the digested food is absorbed in the small intestine to be sent to all cells in the body. Respiration may be aerobic or anaerobic.

Aerobic respiration releases more energy as compared to anaerobic. In human beings, excretory products in the form of soluble nitrogen compounds whereas in plants gum and resin. Control and coordination, in Class 10 Science, have the functions of the nervous system and hormones in our bodies.

The responses of the nervous system as a reflex action, voluntary action or involuntary action. Functions of sensory and motor nerves. The nervous system uses electrical impulses to transmit messages using neurons. Chemical coordination in plants using various hormones. Effect of hormones and related glands in human. The action of the hormones is totally based on a feedback mechanism. Class 10 Science Chapter 8 involves the creation of a DNA copy and additional cellular apparatus by the cell involved in the process and different modes of reproduction depending on their body design.

For example, in fission, many bacteria and protozoa simply divide into two or more daughter cells, whereas organisms such as hydra can regenerate if they are broken into pieces.

Roots, stems and leaves of some plants grow to be new plants through vegetative propagation. Sexual Reproduction is totally different from Asexual Reproduction. Sexual reproduction involves two individuals for the creation of a brand new individual. Reproduction in flowering plants involves the transfer of pollen grains from the anther to the stigma which is referred to as pollination.

Sexual reproduction in human beings involves the introduction of sperm to fertilisation occurs in the fallopian tube. Variations arising during the process of reproduction can be discussed in Chapter 9 Heredity and Evolutions of Class 10 Science. As we know that sexually reproducing individuals have two copies of genes for the same trait.

Concepts of dominant trait and recessive trait traits describe the transfer of traits properly in this chapter. Difference between inherited and acquired traits are the important topics which are frequently asked in Boards. The determination of sex of the offspring depends on different factors in all species. All the variations during the reproductions in the species somehow confer survival advantages. Sometimes it also shows the genetic drift.

Due to geographic isolation, the speciation of species takes place. The concepts given in Light chapter are also important for further classes. The straight-line path of light and mirror � lens application is given for study. We have to study the reflecting surfaces, of all types, obey the laws of reflection and the refracting surfaces obey the laws of refraction.

Main topics are New Cartesian Sign Conventions, mirrors and lenses formula, focal length, the radius of curvature and magnification. The power of a lens is measured as the reciprocal of its focal length. Its SI unit is dioptre.

After going through Chapter 11 of Class 10 Science, we will be able to know about the accommodation of the eye, the near point of the eye or the least distance of distinct vision.

The common defects of vision, which are included in Class 10 Science Chapter 11, are myopia, hypermetropia and presbyopia. We will study here how to form a Rainbow or why we see sky reddish in the morning or evening. The blue colour of the sky and the reddening of the Sun at sunrise and sunset is due to scattering of light.

We will deal here with the basic concepts of Electricity and its heating effects. We know that a stream of electrons moving through a conductor constitutes an electric current.

But, conventionally, the direction of current is taken opposite to the direction of flow of electrons. In Chapter 12 of Class 10 Science , we will learn about the SI unit of electric current, use of a cell or a battery and use of voltmeter and ammeter.

Concepts of resistance and resistivity are also new for class 10 students, but these are important terms for further classes. Here we learn how to find total resistance when they are attached in parallel or series. The unit of power, consumption of electricity with heating effect and commercial unit of electricity are also important for exams.

Here we will learn about a compass needle which is a small magnet and its one end, which points towards north, is called a north pole, and the other end, which points towards the south, is called a south pole. Main topics are Magnetic field, the direction of the magnetic field and a metallic wire carrying an electric current has associated with it a magnetic field.

We know that an electromagnet consists of a core of soft iron wrapped around with a coil of insulated copper wire. Here we have to study about Magnetic field of a solenoid carrying a current with a comparison of a bar magnet. An electric motor and the phenomenon of electromagnetic induction are also important for exams. Questions are frequently asked on the basis of a generator, live wire, fuse, short-circuiting or overloading.

As we know that our energy requirements increase with our standard of living nowadays. For our energy requirements, we have to improve the efficiency of energy usage and also try and exploit new sources of energy. In Chapter 14 of Class 10 Science, we will learn how we are looking for new sources of energy because the conventional sources of energy like fossil fuels are in danger of getting exhausted soon. Here, we will also learn about some solar devices and their advantages and disadvantages.

All the energy sources depend on various factors like the ease and cost of extracting energy from the source. Solar cells, solar cooker, windmills, etc. The various components of an ecosystem are interdependent.

We know that the producers make the energy from sunlight available to the rest of the ecosystem. Food web or food chain is based on producers. The ozone layer is now affected due to excess use of CFCs. The generated waste may be biodegradable or non-biodegradable cause the problem of disposal. In Chapter 16 of Class 10 Science , we will learn how to use our natural resources like forests, wildlife, water, coal and petroleum in a sustainable manner.

We know that fossil fuels like coal and petroleum will ultimately be exhausted after a few years. In this chapter, we will learn how to utilise the renewable resources which may last for many years. Important derivations, numerical problems, practice test and assignments will also have uploaded time to time. To get updates, check the web page once a week or monthly.

Through holiday homework page you can upload you summer holiday, if need help, we will provide the solutions and suggestions according to requirements. Offline Solutions Apps works without Internet. On this website, there is no need to login or registration to use the contents.

There is no current division occurring in a series circuit. Chapter 2: Acids, Bases and Salts Class 10 Science Chapter 2 includes the concepts of Acid-base indicators or mixtures of these dyes which are used to indicate the presence of acids and bases.

Chapter 3: Metals and Non-Metals In Chapter 3 of Class 10 Science, we will study that elements can be classified as metals and non-metals. Chapter 4: Carbon and its Compounds Chapter 4 of Class 10 Science, covers deals with versatile properties of carbon, Catenation and Tetravalency. Chapter 5: Periodic Classification of Elements Class 10 Science Chapter 5 is based on how elements are classified on the basis of similarities in their properties.

Chapter 7: Control and Coordination Control and coordination, in Class 10 Science, have the functions of the nervous system and hormones in our bodies. Chapter 8: How do Organisms Reproduce? Chapter 9: Heredity and Evolution Variations arising during the process of reproduction can be discussed in Chapter 9 Heredity and Evolutions of Class 10 Science.

Chapter Human Eye and Colourful World After going through Chapter 11 of Class 10 Science, we will be able to know about the accommodation of the eye, the near point of the eye or the least distance of distinct vision. Chapter Electricity We will deal here with the basic concepts of Electricity and its heating effects. Chapter Magnetic Effects of Electric Current Here we will learn about a compass needle which is a small magnet and its one end, which points towards north, is called a north pole, and the other end, which points towards the south, is called a south pole.

Chapter Sources of Energy As we know that our energy requirements increase with our standard of living nowadays. Chapter Management of Natural Resources In Chapter 16 of Class 10 Science , we will learn how to use our natural resources like forests, wildlife, water, coal and petroleum in a sustainable manner.

Important Questions on 10th Science Why is respiration considered an exothermic reaction? Energy in our body is obtained from the food we eat. During digestion, large molecules of food are broken down into simpler substances such as glucose.

Glucose combines with oxygen in the cells and provides energy. The special name of this combustion reaction is respiration. Since energy is released in the whole process, it is an exothermic process.

What are olfactory indicators? Give an example. Olfactory indicators are substances which have different odour in acid and base solutions. For example, vanilla essence has characteristics pleasant smell in acid solution and no smell in alkali solution. Platinum, gold and silver are used to make jewellery.

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