Science Practice Quiz 56

Q1.Which characteristic best describes capillaries?

A. They have thick, elastic walls to withstand high pressure. B. They contain valves to ensure unidirectional blood flow. C. Their walls are one-cell thick, facilitating material exchange. D. They carry blood away from the heart to major organs.

Q2.What is the primary role of platelets in the circulatory system, especially during injury?

A. To carry oxygen to various body organs. B. To fight against infections and foreign bodies. C. To minimise blood loss and maintain pressure in case of a leak. D. To transport nutrients and hormones throughout the body.

Q3.What provides the energy for the transfer of sucrose into phloem tissue in plants?

A. Glucose B. ADP C. ATP D. Sunlight

Q4.What happens to the osmotic pressure of phloem tissue when sucrose is transferred into it, and what is the consequence?

A. Decreases, causing water to move out. B. Increases, causing water to move in. C. Remains stable, preventing water movement. D. Decreases, causing water to move in.

Q5.How does the phloem tissue move material within a plant?

A. From areas of low pressure to high pressure. B. Only upwards towards the leaves. C. According to the plant’s needs, from high pressure to low pressure areas. D. Only downwards towards the roots.

Q6.What is the biological process involved in the removal of harmful metabolic wastes from the body called?

A. Respiration B. Photosynthesis C. Digestion D. Excretion

Q7.How do many unicellular organisms remove metabolic wastes from their bodies?

A. Through specialized excretory organs. B. By simple diffusion from the body surface into the surrounding water. C. By converting wastes into useful products. D. Through a complex circulatory system.

Q8.Which of the following is NOT a component of the human excretory system?

A. Kidneys B. Ureters C. Urinary bladder D. Lungs

Q9.Where are the kidneys located in human beings?

A. In the chest cavity, near the heart. B. In the abdomen, one on either side of the backbone. C. In the pelvic region, below the urinary bladder. D. In the head, connected to the brain.

Q10.What is the correct path of urine after it is produced in the kidneys until it is released?

A. Kidneys → Urethra → Urinary bladder → Ureters B. Kidneys → Urinary bladder → Ureters → Urethra C. Kidneys → Ureters → Urinary bladder → Urethra D. Kidneys → Urethra → Ureters → Urinary bladder

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Science Practice Quiz 56