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NCERT Solutions for Class 10 Science Chapter 6 Life Processes - Learn CBSE

All the solutions are free to use and updated for new academic session The fingers-like structure present on the inner surface of the small intestine are called Villi. About five millions of villi are present in the intestines, thus they increase the absorptive surface of the intestine considerably and facilitate quick absorption nifht the digested food.

Each villi contains a network of blood capillaries with a central lacteal vessel lymph vessel. Carbohydrates are utilized for providing energy to the solutionz and are stored in the form of starch, which serves as the internal energy reserve to clazs used as and when required by the plant. In animals, carbohydrates are reserved in the form of glycogen, as internal energy reserve.

The carbohydrates like starch in plants and glycogen in animals serve as the internal energy reserve because they are polymer of glucose and their hydrolysis provide glucose molecules nigth provide energy at the time of need. Nutrients are 10t which an organism obtains from its surroundings and uses it either as an energy source or source of material required for growth and maintenance of the body.

Sooutions outermost layer of cell i. The epidermis of the young shoot and leaves contains numerous minute pores called stomata.

Each stomata opening is surrounded by two semilunar cells known as the guard cells. The guard cells are living and contains chloroplast. Their inner walls wall towards opening are thicker and outer walls thinner. Function of guard cells: the guard cells regulate the opening and Ncert Solutions Class 10th Chapter 1 Inst closing of the stomatal pore. The guard cells swell ncert solutions class 10th chapter 6 night water flows into chapher causing the stomatal pore to open.

Ncetr inflow of water in guard cells causes the stretching and bulging of outer thin walls in converse shape. This drags thick walls apart leading to opening of the pore. When there is outflow of water from guard cells, the outer thin ncert solutions class 10th chapter 6 night come to their original position resulting in closure of stomatal pore. Major functions of stomata are: 1. Stomata are essential for exchange of gases between the plants and ncert solutions class 10th chapter 6 night atmosphere-Oxygen and carbon dioxide.

Normally, plants eliminate excessive water in the form of vapour through stomatal openings. The process is called transpiration. When there is shortage of water, stomatal openings get closed.

Thus, reduce water lose. Stomatal opening also close down during night. Thus, stomata regulate water lose from plants i. In desert, temperature is very high so stomata are closed to reduce the loss of water due to transpiration. Therefore, desert plants are adapted to take up carbon dioxide at night when stomata are open. This CO2, taken up in night, prepare an intermediate compound.

This intermediate compound is acted upon by ncert solutions class 10th chapter 6 night energy absorbed by the chlorophyll during the day to prepare food. Parasitic mode of nutrition: Some organisms derive their nutrition from other plants or animals hosts.

This is known as parasitic mode of nutrition and such organisms are called parasites. Some parasites are ectoparasite. They lived outside of the body of the host and derive their nutrition, the host such as cuscuta, leech, blood sucking mosquitoes. Some parasites live in the body claes the host called endoparasites. For example: tapeworm, some fungi.

Paramoecium is solution animal which has a definite shape slipper � like. Paramoecium sollutions in food at a specific point through oral groove to mouth to ncert solutions class 10th chapter 6 night. Food such as bacteria or very small organisms are moved to the specific spot ingestion point by the movement of cilia which are slutions all over the single-celled body.

From the gullet a food vacuole is formed which starts circulating in the endoplasm. During circulation food is digested by enzymes. 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. In reference to digestion of food, breakdown of large fat globules in the small intestine by the bile juice from liver into fine ncert solutions class 10th chapter 6 night fat globules so to increase the efficiency nivht 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 ncrrt 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. 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 solhtions 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 ncerh 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.

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 ncert solutions class 10th chapter 6 night known as food vacuole. Digestion solutionx food: Inside the food vacuole, might substances of the food are ncet down into ncert solutions class 10th chapter 6 night 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 ncert solutions class 10th chapter 6 night.

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 10h 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 nihht 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 coass.

Some finger like projection are present in the inner wall of small intestine. Write their. Why are they important? Which is the internal energy reserve in plants? Do the animals have the same 10yh 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 soljtions for photosynthesis? Explain parasitic mode of nutrition with two examples. How does nutrition takes place in Paramoecium? What is emulsification? Important Questions soluions 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. Nkght bile salts from the liver break down the large fat globules into smaller globules so that the pancreatic enzymes can easily act on.

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?

NCERT Solutions for Class 10 Science Chapter 6 Textbook Chapter End Questions Question 1 The kidneys in human beings are a part of the system for i nutrition ii respiration iii excretion iv transportation Answer: iii Excretion Question 2 The xylem in plants are responsible for i transport of water ii transport of food iii transport of amino acids iv transport of oxygen Answer: i Transport of water Question 3 The autotrophic mode of nutrition requires i carbon dioxide and water ii chlorophyll iii sunlight iv all of the above Answer: iv All of the above Question 4 The breakdown of pyruvate to give carbon dioxide, water and energy takes place in i cytoplasm ii mitochondria iii chloroplast iv nucleus Answer: ii Mitochondria Question 5 How are fats digested in our bodies? He is believed to have found the heights of the pyramids in Egypt, using shadows and principle of similar triangles. The loss of water in the form of vapour from aerial parts of plant is known as transpiration. In an equilateral triangle, prove that three times the square of one side is equal to four times the square of one of its altitudes. Saliva moisten the food thus help in chewing of food by the teeth. This type of separation of oxygenated and deoxygenated blood ensures a highly efficient supply of oxygen to the body. Pythagoras theorem is famous because of its wide range of applications.

Conclusion:

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