ICSE Class 8 Biology Question Paper(Chapters: 1. Reproduction in Plants | 2. Health and Hygiene)

📝 ICSE Class 8 Biology Question Paper

Chapters: 1. Reproduction in Plants | 2. Health and Hygiene

Total Marks: 30

Instructions:

 * Attempt all questions.

 * The intended marks for questions or parts of questions are given in brackets.

Section A: Multiple Choice Questions (MCQs) - (6 Marks)

Choose the correct option:

 1. The transfer of pollen grains from the anther to the stigma of the same flower is called: [1]

   a) Cross-pollination

   b) Self-pollination

   c) Fertilization

   d) Germination

 2.Which part of the flower develops into the fruit after fertilization? [1]

   a) Ovule

   b) Stigma

   c) Ovary

   d) Sepal

 3The common method of asexual reproduction in yeast is: [1]

   a) Spore formation

   b) Fragmentation

   c) Budding

   d) Binary fission

 4 A disease caused by a fungus is: [1]

   a) Tuberculosis

   b) Ringworm

   c) Measles

   d) Typhoid

 5 The practice of adding chlorine to water to kill germs is called: [1]

   a) Filtration

   b) Sedimentation

   c) Chlorination

   d) Distillation

 6 Which of the following is a symptom of dehydration? [1]

   a) Increased urination

   b) Dry mouth and skin

   c) Fever

   d) Swollen glands

Section B: Assertion and Reasoning (A-R) - (4 Marks)

Instructions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

a) Both A and R are true, and R is the correct explanation of A.

b) Both A and R are true, but R is not the correct explanation of A.

c) A is true, but R is false.

d) A is false, but R is true.

 7 Assertion (A): The seeds of the coconut plant are dispersed by water (hydrochory). [1]

   Reason (R): Coconut fruit has a fibrous coat which makes it light and buoyant.

 8 Assertion (A): Vaccination is an effective way to prevent certain communicable diseases. [1]

   Reason (R): Vaccines contain weakened or dead microbes that stimulate the body to produce antibodies.

 9 Assertion (A): AIDS is a non-communicable disease. [1]

   Reason (R): AIDS is caused by the Human Immunodeficiency Virus (HIV).

 10 Assertion (A): Grafting is a preferred method of artificial vegetative propagation for growing mango trees. [1]

   Reason (R): Grafting ensures that the new plant retains the desirable characteristics of the parent plant.

Section C: Short Answer Questions - (12 Marks)

Answer the following questions briefly (2 marks each):

 11 Define fertilization in plants. Where does it take place? [2]

 12 Differentiate between a rhizome and a tuber with one example each. [2]

   

 13 List two advantages of asexual reproduction in plants. [2]

 14 What are communicable diseases? Give two examples. [2]

 15 State any two general ways to prevent the spread of diseases transmitted through vectors like mosquitoes. [2]

 16 Explain the importance of maintaining personal hygiene regarding dental care. [2]

Section D: Case Study - (8 Marks)

Read the following case and answer the questions that follow:

17.Case Study: The Gardener's Choice

Mr. Sharma, a professional gardener, wants to multiply his favorite rose plant and a special variety of high-yield sugarcane. He decides to use two different methods of vegetative propagation. For the rose, he cuts a small portion of the stem and plants it in the soil. For the sugarcane, he uses a technique where a small segment of the stem with a node is planted. He notices that the new plants produced through these methods are exact copies of the parent plants. However, in his citrus grove, the citrus trees produce seeds, and when he plants them, the resulting plants show some variations.

 1 Name the method of vegetative propagation Mr. Sharma used for the rose plant. [1]

 2 What is the small segment of the sugarcane stem with a node called, and which type of propagation is this an example of? [2]

 3 Why are the new rose and sugarcane plants produced through vegetative propagation considered exact copies of the parent plant? [2]

 4 Explain the difference in the offspring produced by the citrus grove (via seeds) compared to the rose and sugarcane. Why does this variation occur? [3]