Question:- In the stem of a plant respiration and breathing takes place through: A. Lenticels B. Stomata C. Root hair D. Air tubes
Answer:- Ans. A Explanation: In woody stems of plants or trees have lenticels for the exchange of respiratory gases.
Question:- Which animal has three-chambered heart? A. Pigeon B. Lizard C. Fish D. Lion
Answer:- Ans. B Explanation: Lizard has three-chambered heart. Except crocodiles all the reptiles and have three-chambered heart. Crocodiles have four-chambered heart. Pigeons have four-chambered heart. Fish have two-chambered heart. Lion have four-chambered heart. Birds and mammals have four chambered heart i.e. 2 atria and 2 ventricles. Three-chambered consists of 2 atria and 1 ventricle and two-chambered heart consists of 1 atria and 1 ventricle.
Question:- Name the blood vessel which carries blood back to the heart? A. Vein B. Artery C. Capillaries D. Platelet
Answer:- Ans. A Explanation: Arteries carries blood from the heart to the body organs and veins carries blood from the body organs back to the heart.
Question:- Transportation of food in plants takes place through: A. Xylem B. Phloem C. Companion cells D. Tracheids
Answer:- Ans B Explanation: Plants have two tissues that help in transportation. Xylem transports water and solutes from the roots to the leaves while phloem transports food from the leaves to the rest of the plant.
Question:- After wound or cut in a body blood coagulates through: A. WBC B. RBC C. Platelets D. Plasma
Answer:- Ans. C Explanation: After wound or cut in a body it starts to bleed. But within few seconds or minutes blood cells start to clump together and clot, preventing the further blood loss. These clots are created by a type of blood cell called platelet.
Question:- When blood is forced into the artery, wave like expansion takes place is called: A. Heart beat B. Pulse C. Flow D. Ticking
Answer:- Ans. B Explanation: The expansion of an artery each time the blood is forced into it is called pulse. The pulse rate of an adult person while resting is 70 to 72 per minute. From the above quiz we have seen various life processes that take place in an organism.