1. List down the raw materials for photosynthesis? (1 Mark)
2. Specify what is the role of bile juice in the process of digestion? (1 Mark)
3. Name the respiratory organ in fish and earthworm. (1 Mark)
4. Name the types of blood vessels used for the transportation of blood. (1 Mark)
5. What is dialysis? (1 Mark)
6. How is respiration in plants and respiration in animals different? (2 Marks)
7. Draw the labeled diagram of the human digestive system. (2 Marks)
8. How are alveoli designed and why? (2 Marks)
9. Define excretion. What are the two organs in human beings that act as accessory excretory organs? (2 Marks)
10. State the role of the following (i) Chloroplasts (ii) Diaphragm (iii) Larynx (3 Marks)
11. Give reasons for the following:
(i) The glottis is guarded by epiglottis.
(ii) It is said to not speak while eating.
(iii) Walls of trachea are supported by cartilage rings. (3 Marks)
12. Leaves of a potted plant were coated with wax to block the stomata.
Will this plant remain alive and healthy for long? State three reasons for your answer. (3 Marks)
13. Describe the process and importance of double circulation in humans. (3 Marks)
14. (i) Name the blood vessel that brings oxygenated blood to the human heart. (5 Marks)
(ii) Which chamber of human heart receives oxygenated blood?
(iii) Explain how oxygenated blood from this chamber is sent to all parts of the body.
Answers
Answer:
1.The raw materials of photosynthesis, water and carbon dioxide, enter the cells of the leaf, and the products of photosynthesis, sugar and oxygen, leave the leaf.
2.Bile is a fluid that is made and released by the liver and stored in the gallbladder. Bile helps with digestion. It breaks down fats into fatty acids, which can be taken into the body by the digestive tract.
3.Sr. No. Name of animal Respiratory organ
1 Fish Gills
2 Earthworm Skin
3 Cockroach Trachea
4 Human Lungs
4.There are three kinds of blood vessels: arteries, veins, and capillaries. Each of these plays a very specific role in the circulation process. Arteries carry oxygenated blood away from the heart
5.a process for separating substances from a liquid, especially for taking waste substances out of the blood of people with damaged kidneys
Answer:
1 .The raw materials of photosynthesis, water and carbon dioxide, enter the cells of the leaf, and the products of photosynthesis, sugar and oxygen, leave the leaf.
2.Bile is a fluid that is made and released by the liver and stored in the gallbladder. Bile helps with digestion. It breaks down fats into fatty acids, which can be taken into the body by the digestive tract.
3.gills
4.There are three kinds of blood vessels: arteries, veins, and capillaries. Each of these plays a very specific role in the circulation process. Arteries carry oxygenated blood away from the heart
5. Dialysis is also called artifical kidney. It just works as a kidney and removes all the metabolic wastes produced in our body. Dialysis is used by kidney failure patients all over the world . Dialysis has a dialyzing fluid which removes wastes from the body. It takes around 2-3 hours to complete this process.
6. Plants and animals both have different ways for respiration. The process of breathing is absent in plants instead they respire via their leaves. Animals show breathing processes and show cellular respiration. Plants take oxygen directly from the surrounding through stomata.
8.The alveoli are thin-walled and richly supplied with a network of blood vessels to facilitate the exchange of gases between blood and the air-filled in alveoli. ... They have a balloon-like structure that provides maximum surface area for exchange of gases
9.Excretion is the process by which metabolic waste is eliminated from an organism. ... Excretion is important to maintain the body temperature. The organs in human beings that act as accessory excretory organs are kidneys and liver.