📘 Study MCQs Q1. The plant in which new plantlets arise from buds present on the margins of leaves is: A. Potato B. Sweet potato C. Bryophyllum D. Ginger AnswerC. BryophyllumDetails CloseBryophyllum (also called Kalanchoe or “mother of thousands”) is a classic example of vegetative propagation by leaves. Along the notches or margins of its […]
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📘 Study MCQs Q1. The process by which living organisms produce new individuals of their own kind is called: A. Excretion B. Reproduction C. Respiration D. Circulation AnswerB. ReproductionDetails CloseReproduction is a fundamental biological process through which living organisms produce offspring that are similar to themselves. It ensures the continuation of a species from one
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Q1. White blood cells are more numerous than red blood cells in a healthy human body. True False Details Red blood cells are far more numerous than white blood cells. In a healthy adult, there are about 4.5 to 5.5 million red blood cells per microliter of blood, but only about 4,000 to 11,000 white
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Q1. Diffusion is sufficient for the transport of gases and wastes in unicellular organisms like Amoeba. True False Details Unicellular organisms have a very large surface area to volume ratio, meaning every part of the cell is close to the cell membrane. Oxygen, carbon dioxide, and wastes can move directly across the cell membrane by
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📘 Study MCQs Q1. The rhythmic contraction and relaxation of the heart is called: A. Pulse B. Heartbeat C. Blood pressure D. Circulation AnswerB. HeartbeatDetails CloseThe heartbeat is the complete sequence of contraction (systole) and relaxation (diastole) of the heart chambers. Each heartbeat pumps blood into the arteries. An adult human heart beats about 60
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📘 Study MCQs Q1. The blood vessels that carry blood away from the heart are called: A. Veins B. Capillaries C. Arteries D. Venules AnswerC. ArteriesDetails CloseArteries are thick-walled blood vessels that carry oxygen-rich blood away from the heart to various parts of the body. They have thick, muscular, and elastic walls because blood flows
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📘 Study MCQs Q1. The primary function of red blood cells is to: A. Fight infection B. Transport oxygen C. Clot blood D. Produce antibodies AnswerB. Transport oxygenDetails CloseRed blood cells contain a special protein called hemoglobin, which binds to oxygen in the lungs. As blood circulates, hemoglobin releases this oxygen to all the cells
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Q1. Photosynthesis occurs only during the daytime. True False Q2. All metals are good conductors of electricity. True False Q3. The human heart has four chambers. True False Q4. Sound can travel through a vacuum. True False Q5. The boiling point of water decreases at higher altitudes. True False Q6. Plants absorb oxygen during photosynthesis.
Q1. Photosynthesis occurs only during the daytime. True False Details Photosynthesis requires sunlight as a source of energy to convert carbon dioxide and water into glucose and oxygen. Since sunlight is available only during the day, the light-dependent reactions of photosynthesis occur during daytime. However, some processes like the Calvin cycle can continue briefly in
Q1. Photosynthesis occurs only during the daytime. True False Details Photosynthesis requires sunlight as a source of energy to convert carbon dioxide and water into glucose and oxygen. Since sunlight is available only during the day, the light-dependent reactions of photosynthesis occur during daytime. However, some processes like the Calvin cycle can continue briefly in
