Exam-style CBSE practice questions on Transportation (Life Processes). Try each one first, then reveal the correct answer and a step-by-step explanation. Free, from EduLevel — the AI teacher for CBSE.
What is the primary function of xylem tissue in plants?
Think about what essential substances plants need from the soil to survive and grow.
Explanation: Xylem is a vascular tissue in plants that conducts water and dissolved minerals from the roots to the rest of the plant.
What are the blood vessels that are one-cell thick called? (a) Alveoli (b) Capillaries (c) Arteries (d) Veins
Think about the tiny structures in the body responsible for the exchange of substances like oxygen and carbon dioxide between the blood and the tissues.
Explanation: Capillaries are the narrowest blood vessels with walls that are only one cell thick. This thinness facilitates the efficient exchange of gases, nutrients, and waste products between the blood and body tissues.
From the following statements about lymph, select the ones that are TRUE: A. Lymph vessels transport lymph throughout the body, eventually opening into larger arteries. B. Lymph is composed of some plasma, proteins, and blood cells. C. Lymph is composed of some plasma, proteins, and red blood cells. D. Lymph vessels transport lymph throughout the body, eventually opening into larger veins. Which combination represents the true statements? (a) A and B (b) B and D (c) A and C (d) C and D
Consider the circulatory system's pathways. Where does fluid typically return to the bloodstream after circulating through tissues?
Explanation: Statement D is correct as the lymphatic system drains lymph back into the circulatory system via large veins. Statement B is also correct as lymph contains plasma, proteins, and white blood cells (lymphocytes), but lacks red blood cells.
Evaluate the following statements for an Assertion-Reason question. Assertion (A): Xylem tissue is responsible for transporting water and minerals absorbed from the soil by the roots. Reason (R): Xylem tissue is located exclusively in the roots of a plant. Choose the correct option based on these statements.
Recall the primary functions of different plant vascular tissues. Does xylem have other roles besides transport?
Explanation: Assertion (A) is true as xylem's primary function is water and mineral transport. Reason (R) is false because xylem is a vascular tissue found throughout the plant, including the stem and leaves, not just the roots.
Identify the true statement(s) about the human heart from the following list: (A) The right atrium receives oxygenated blood from the lungs through the pulmonary artery. (B) The left atrium transfers oxygenated blood to the left ventricle, which then pumps it to various parts of the body. (C) The right atrium receives deoxygenated blood from the upper and lower body via the vena cava. (D) The left atrium transfers oxygenated blood to the aorta, which then distributes it to different parts of the body. Choose the correct combination of true statements:
Focus on the distinct roles of the right and left sides of the heart, and the type of blood each handles.
Explanation: Statement (B) is correct as the left atrium passes oxygenated blood to the left ventricle. Statement (C) is correct as the right atrium receives deoxygenated blood from the body. Statements (A) and (D) are incorrect.
From the following statements, determine which one(s) are true regarding the human heart: (A) The right atrium receives oxygenated blood from the lungs through the pulmonary artery. (B) The left atrium transfers oxygenated blood to the left ventricle, which then sends it to various parts of the body. (C) The right atrium receives deoxygenated blood from different parts of the body through the vena cava. (D) The left atrium transfers oxygenated blood to the aorta, which then sends it to different parts of the body. Select the correct option:
Recall the double circulation of blood in humans and the roles of the atria and ventricles in pumping blood.
Explanation: Statements (B) and (C) correctly describe the function of the left and right atria in blood circulation. Statements (A) and (D) contain inaccuracies regarding blood type, vessels, or chambers.
What is the biological term for the process of transporting soluble products of photosynthesis in plants?
Think about how plants move essential substances, like sugars produced during photosynthesis, from where they are made to other parts of the plant that need them for energy or storage.
Explanation: Translocation is the specific process of moving sugars (products of photosynthesis) from leaves to other parts of the plant through the phloem tissue.
The opening and closing of stomata is caused by which of the following?
Consider the process that allows plant cells to change their shape and turgidity.
Explanation: The opening and closing of the stomatal pore is controlled by the change in turgor pressure of the guard cells, which is a direct result of water moving into or out of them via osmosis.
What is the primary reason for water entering the roots of a plant from the soil? (a) The inherent function of the root is to absorb water. (b) A difference in ion concentration exists between the root cells and the soil. (c) There is an excess amount of water available in the soil. (d) Water diffuses into the roots.
Think about how substances move from an area of higher concentration to an area of lower concentration in biological systems.
Explanation: The active uptake of ions by root cells creates a lower water potential inside the root compared to the soil, causing water to move into the root via osmosis to balance the concentration difference.
Evaluate the following statements: Assertion (A): The walls of the atria are thicker than those of the ventricles. Reason (R): Ventricles are responsible for pumping blood to various organs at high pressure. Choose the correct option.
Consider the primary function of each chamber of the heart and the force required for that function.
Explanation: The Assertion (A) is false because ventricular walls are much thicker than atrial walls. The Reason (R) is true as the ventricles need to generate high pressure to pump blood to the lungs and the rest of the body.
A process, labeled X, involves the loss of water as vapor from the aerial parts of plants. This process aids in Y. Identify X and Y from the given options.
The question describes a process where plants release water vapor from their leaves. Think about the primary term used in biology for this specific water loss.
Explanation: The process of water loss as vapor from aerial plant parts is called transpiration (X). This process has a cooling effect on the plant, thus helping in temperature regulation (Y).
What is the functional advantage of separating the right and left sides of the heart?
Consider the primary role of the heart in the circulatory system and the different types of blood it needs to transport.
Explanation: The separation of the heart's chambers prevents the mixing of oxygen-rich blood (left side) and oxygen-poor blood (right side), which ensures a highly efficient supply of oxygen to the body's tissues.
What is the primary mechanism responsible for the upward movement of water in tall trees?
Think about the process where plants lose water vapor, primarily through their leaves, and how this loss might create a pull for more water from the roots.
Explanation: Transpiration, the evaporation of water from leaves, creates a suction force or 'pull' that draws water up from the roots through the xylem vessels, even in very tall trees.
During spring, sugar that is stored in the root or stem tissue of plants is transported to the buds. What is the purpose of this process?
Consider what plants need to do in the spring after a period of dormancy. What is the primary activity that begins for the plant's survival and continuation?
Explanation: The developing buds have high energy requirements for growth, and the stored sugar is transported to them via the phloem to provide this necessary energy.
Identify the two components of phloem tissue that are primarily involved in the transportation of food within plants.
Think about the primary function of phloem tissue in plants and which components are specialized for this transport role.
Explanation: Sieve tubes form the main channels for transporting sugars, while companion cells provide metabolic support and regulate the loading and unloading of these sugars.
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