Class 10 Biology Chapter 1 - Life Process Most Important Questions Question 1. Most of the digestion and absorption of the food takes place in the (a) small intestine (b) liver (c) stomach (d) large intestine. Answer: (a) small intestine Question 2. Mention the raw materials required for photosynthesis. (Board Term I, 2016) Answer: Raw materials required for photosynthesis are carbon dioxide (CO2), water, light and chloroplast. Question 3. State the location and function of gastric glands. Answer: Gastrifc glands are present in the wall of the stomach. They secrete gastric juices containing mucus, protein digesting enzymes pepsin, rennin and hydrochloric acid . Question 4. Name the glands present in the wall of the stomach that release secretions for digestion of food. Write the three components of secretion that are released by these glands. Answer: Stomach’s muscular wall contains gastric glands. These glands secrete gastric juices which contain di...
Class 10 Biology Chapter 5 - Our environment Important Questions Most important questions:- Question 1. Why is the maximum concentration of pesticides found in human beings? Answer: The pesticides are not biodegradable, they get accumulated progressively at each trophic level. As human beings occupy the topmost level in food chain, their concentration becomes maximum in our bodies. Question 2. Give one method which could be applied to reduce our intake of pesticides through food to some extent. Answer: By using biological methods for controlling insects in fields and by washing fruits and vegetables before eating could help to reduce our intake of pesticides through food to some extent. Question 3. Various steps in a food chain represent: (a) food web (b) trophic level (c) ecosystem (d) biomagnification. Answer: (b) trophic level Question 4. What is an ecosystem? Answer: An ecosystem is defined as a structural and functional unit of the biosphere. It comprises of living organisms ...
Class 10 Biology Chapter 3 - How do Organisms Reproduce Important Questions Most Important Questions:- Question 1. Newly formed DNA copies may not be identical at times. Give one reason. Answer: When a cell reproduces, DNA replication occurs which results in formation of two similar copies of DNA. The process of copying the DNA leads to some variations each time. As a result, the DNA copies produced are similar to each other but sometimes may not identical. Question 2 When a cell reproduces, what happens to its DNA? Answer: When a cell reproduces, DNA replication occurs which forms two similar copies of DNA.. Question 3. How do Plasmodium and Leishmania reproduce? Write one difference in their mode of reproduction. Answer: Plasmodium and Leishmania reproduce by the process of fission which is an asexual mode of reproduction. Plasmodium reproduces by multiple fission. About 1000 daughter cells are produced by the multiple fission of a Plasmodium. Leish...
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