Chapter 14: Transportation in Plants and Circulation in Animals — Online MCQ Test
SCIENCE · CLASS 10th · Tamil Nadu State Board
Practice Chapter 14: Transportation in Plants and Circulation in Animals with a free chapter-wise online MCQ test.
This chapter covers: Focusing on transport mechanisms this chapter details xylem phloem ascent of sap and transpiration in plants. Students study human blood composition heart structure blood circulati....
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Chapter 14: Transportation in Plants and Circulation in Animals — Important Questions & Answers
Which tissue in plants is responsible for the transport of water and minerals?
- A. Xylem
- B. Phloem
- C. Parenchyma
- D. Collenchyma
Answer: A. Xylem
Xylem is the vascular tissue that transports water and dissolved minerals from the roots to the rest of the plant.
Xylem is the vascular tissue that transports water and dissolved minerals from the roots to the rest of the plant.
What is the primary function of the valves in the human heart?
- A. To increase blood pressure
- B. To prevent backflow of blood
- C. To filter waste products
- D. To initiate the heartbeat
Answer: B. To prevent backflow of blood
Valves ensure that blood flows in only one direction through the heart chambers, preventing backflow.
Valves ensure that blood flows in only one direction through the heart chambers, preventing backflow.
Which of the following is the 'pacemaker' of the human heart?
- A. AV node
- B. SA node
- C. Bundle of His
- D. Purkinje fibers
Answer: B. SA node
The Sino-Atrial (SA) node is known as the pacemaker because it initiates the electrical impulses for heart contraction.
The Sino-Atrial (SA) node is known as the pacemaker because it initiates the electrical impulses for heart contraction.
Which of these is NOT a function of the transpiration process in plants?
- A. Cooling the plant surface
- B. Maintaining cell turgidity
- C. Active uptake of carbon dioxide
- D. Absorption of minerals
Answer: C. Active uptake of carbon dioxide
Transpiration creates the pull for water transport and cools the plant, but CO2 uptake occurs via diffusion through stomata, not transpiration.
Transpiration creates the pull for water transport and cools the plant, but CO2 uptake occurs via diffusion through stomata, not transpiration.
During a cardiac cycle, the 'lub' sound is produced by:
- A. Opening of the semilunar valves
- B. Closing of the atrioventricular valves
- C. Opening of the atrioventricular valves
- D. Closing of the semilunar valves
Answer: B. Closing of the atrioventricular valves
The first heart sound (lub) occurs during ventricular systole when the mitral and tricuspid valves close.
The first heart sound (lub) occurs during ventricular systole when the mitral and tricuspid valves close.