Tiêu đề Advanced series 10th class Biology - Solutions.pdf ✅

Class 10 Biology Table of Content 1. Life Process - Digestion and Absorption 1 – 8 2. Life Process - Breathing and Exchanges of Gas 9 – 13 3. Life Process - Transportation 14 – 22 4. Life Process - Excretory System 23 – 36 5. Life Process in Plants 37 – 53 6. Control and Coordination 54 – 73 7. How Do Organisms Reproduce? 74 -78 8. Heredity and Evolution 79 – 86 9. Our Environment 87 – 101 10. Sustainable Management of Natural Resources 102 - 116

Class 10 – Biology | A-10 Life Process – Digestion and Absorption 1 1. Life Process- Digestion and Absorption Solutions LEVEL-I 1. Correct Option: (C) iii & iv Cuscuta, ticks, and leeches are parasites that feed by living on or inside another organism's body. Cuscuta species are plant parasites. Since they lack chlorophyll, they cannot use photosynthesis to produce their sustenance. To grow, they depend on other plants for nutrients, which weakens the host plant. Most leeches are sanguivorous, that is they feed as blood sucking parasites on preferred hosts. 2. Correct Option: (B) humidity There are many factors that can alter the rate of photosynthesis. However, one that does not affect this process is Humidity. Studies are indicative of the fact that humidity plays an almost negligible role in the process of photosynthesis. 3. Correct Option: (B) Remove starch from leaves The process is known as destarching. This is done so because the result of the experiment is not affected. 4. Correct Option: (A) Bile Bile is a digestive juice that has no enzymes. Bile is an alkaline liquid that helps in emulsification of fat i.e., it helps in breakdown of large fat globules into smaller droplets that increases its surface area and accelerates digestion. 5. Correct Option: (A) The entire body surfaces In single celled animals like amoeba, the food is taken up by the whole body. The process by which the single celled animals feed is known as Phagocytosis. In this process, the single celled organisms bring the food into the inner part of the cell for digestion. 6. Correct Option: (A) C.B. Van Neil By studying purple Sulphur bacteria and green Sulphur bacteria he was the first scientist to demonstrate, in 1931, that photosynthesis is a light-dependent redox reaction in which hydrogen from an oxidizable compound reduces carbon dioxide to cellular materials. 7. Correct Option: (C) Starch In the presence of starch, iodine changes its color from brown to blue-black or purple. So, iodine can be used to test the presence of starch. 8. Correct Option: (C) Joseph priestly In 1770 he performed a series of experiments that showed the essential role of air in the growth of green plants. Priestley hypothesis: Plants restore to the air whatever breathing animals and burning candles. 9. Correct Option: (B) Jan Ingenhousz Oxygen is evolved during photosynthesis as demonstrated by Jan Ingenhousz through an experiment on the aquatic plant -Hydrilla. He showed that in bright sunlight, small bubbles formed around the green parts of the plant while in dark, no bubbles were formed. He identified those bubbles as oxygen.
Class 10 – Biology | A-10 Life Process – Digestion and Absorption 2 10. Correct Option: (C) Engelman Engelmann used oxygen loving bacteria to grow on the algae. The bacteria congregating in the region of the red and blue light indicated that there was more oxygen being produced in these areas, indicating there was more photosynthetic activity in these areas. 11. Correct Option: (A) Pelletier & Caventou Chlorophyll was first extracted by Pelletier and Caventou in 1817. At the time of their work, scientists know that green plants consume carbon dioxide and release oxygen. 12. Correct Option: (B) 40-100 Chloroplasts are present in large numbers in the cells (around 40 – 100) of plant tissue like the stomatal guard cells and ground tissues. 13. Correct Option: (A) Daniel I. Arnon In the 1950s, Arnon performed research with Mary Belle Allen and F. Robert Whatley on chloroplasts and their role in photosynthesis, identifying a process which they named "photosynthetic phosphorylation." 14. Correct Option: (B) Photolysis The splitting of water molecules is called photolysis of water. During the light reaction of photosynthesis, the absorption of light by the chlorophyll results in the loss of the electron from it. To fulfill the electron requirement, the water molecule splits and donates the electron to the chlorophyll and at that time oxygen is released. 15. Correct Option: (B) ATP, NADPH The assimilatory powers produced during light reaction of photosynthesis are ATP and NADPH. These are utilized to form carbohydrates (sugars) during light independent reactions of photosynthesis. 16. Correct Option: (A) Less than even 1/1000 of a second 1/1000th seconds because there is A server-containing system. 17. Correct Option: (C) Blue & Red Chlorophyll is a photosynthetic pigment. Violet-blue and Orange-red light wavelengths are absorbed by chlorophyll A. The rate of photosynthesis is more in blue and red light. 18. Correct Option: (B) C6H12O6 The end product of this reaction is that the Co2 is converted into glucose (Carbohydrates form). 19. Correct Option: (A) Amylase Salivary amylase (Ptyalin) is a glucose-polymer cleavage enzyme that is produced by the salivary glands. 20. Correct Option: (A) Bile juice Emulsification is done by the action of bile secretes from the liver. Bile contains bile pigment and bile salts. Bile salts break down the fats into smaller globules and result in a milky emulsion. These emulsified fats are again digested by pancreatic lipase into fatty acid and glycerol. 21. Correct Option: (D) Both a & b Pancreatic juice consists of alkaline (chiefly bicarbonate) fluid and enzymes; 200–800 ml is produced each day. Enzymes, such as trypsin, chymotrypsin, lipase, and amylase, are essential for the digestion of most of the protein, fat, and carbohydrate in the meal.