Biology Unit 1: ASM 1 Science PUBE ployment of OS 8 Date: Do you CO3 Time: 40 min, Max. marks: 20 Autio 0141 Name: PAMA Instructions: Write your name and the date on the question paper and the answer sheet. Read the question paper carefully before you start writing. Write only the question number followed by the answer. Do not write the questions Write the answers on the answer sheet. 1. Fill in the blanks. a) are the undesired plants that grow along with crops in the field. (2 marks) b) are areas where plants, animals, and certain human communities are protected and preserved. (2 marks) 2. Choose the correct option. a) Which of the following is the causative microorganism of cholera? (i) Virus (ii) Fungi (iii) Bacteria (iv) Protozoa b) Which of the following can help improve the fertility of soil? (i) Irrigation (ii) Tilling (iii) Harvesting (iv) Crop rotation 3. Answer the following questions in 30-40 words: (8 marks) a) List the seven steps involved in crop production from start to end. b) List and describe any two effects of deforestation. c) Rishi bought wheat grains and directly planted them in tilled soil. However, most of the seeds did not end up growing into healthy plants. Suggest two reasons why this could have happened. d) Someone in your family is suffering from a disease spread by a water-borne pathogen. What precautions will you take to ensure that the disease does not spread to others? (8 marks) 4. Answer the following questions in 60-80 words: a) Draw a neat-labelled flowchart to explain the nitrogen cycle. b) Explain how microorganisms are used in food production. Class 8 - Biology - Unit 1 - ASM 1 - 1 LEAD SCHOOL
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Biology Unit 1: ASM 1 Science PUBE ployment of OS 8 Date: Do you CO3 Time: 40 min, Max. marks: 20 Autio 0141 Name: PAMA Instructions: Write your name and the date on the question paper and the answer sheet. Read the question paper carefully before you start writing. Write only the question number followed by the answer. Do not write the questions Write the answers on the answer sheet. 1. Fill in the blanks. a) are the undesired plants that grow along with crops in the field. (2 marks) b) are areas where plants, animals, and certain human communities are protected and preserved. (2 marks) 2. Choose the correct option. a) Which of the following is the causative microorganism of cholera? (i) Virus (ii) Fungi (iii) Bacteria (iv) Protozoa b) Which of the following can help improve the fertility of soil? (i) Irrigation (ii) Tilling (iii) Harvesting (iv) Crop rotation 3. Answer the following questions in 30-40 words: (8 marks) a) List the seven steps involved in crop production from start to end. b) List and describe any two effects of deforestation. c) Rishi bought wheat grains and directly planted them in tilled soil. However, most of the seeds did not end up growing into healthy plants. Suggest two reasons why this could have happened. d) Someone in your family is suffering from a disease spread by a water-borne pathogen. What precautions will you take to ensure that the disease does not spread to others? (8 marks) 4. Answer the following questions in 60-80 words: a) Draw a neat-labelled flowchart to explain the nitrogen cycle. b) Explain how microorganisms are used in food production. Class 8 - Biology - Unit 1 - ASM 1 - 1 LEAD SCHOOL