Question map
Match List I with List II and select the correct answer using the code given below the Lists : List I (Cell type) A. Red Blood Cell B. White Blood Cell C. The Platelets D. The Plasma List II (Function) 1. Help blood to clot 2. Fight infection 3. Carrier of dissolved substances 4. Transport oxygen Code : A B C D
Explanation
Blood is a fluid connective tissue composed of plasma and formed elements. Red Blood Cells (erythrocytes) contain hemoglobin, which has a high affinity for oxygen, enabling them to transport oxygen from the lungs to tissues [1]. White Blood Cells (leukocytes) are essential components of the immune system that fight infections by defending against pathogens like bacteria and viruses. Platelets (thrombocytes) are cell fragments that circulate and plug leaks by helping the blood to clot at sites of injury, preventing excessive blood loss [2]. Plasma is the liquid medium that constitutes about 55% of blood; it acts as a carrier for dissolved substances, including nutrients like glucose, electrolytes, and waste products like carbon dioxide and nitrogenous wastes [1]. Matching these functions results in the sequence A-4, B-2, C-1, D-3.
Sources
- [1] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > Activity 5.7 > p. 91
- [2] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > Maintenance by platelets > p. 94