Class 7 Science Chapter 7 Practice Question Answers - Transportation in Animals and Plants

Q1. Water absorption through roots can be increased by keeping the plants:
(a) in the shade
(b) in dim light
(c) under the fan
(d) covered with a polythene bag
Ans: (c)
Water absorption through roots can be increased by keeping under the fan.

Q2. The process by which a plant loses water through the stomata is called:
(a) excretion
(b) transpiration
(c) respiration
(d) sweating
Ans: (b)
The process by which a plant loses water through the stomata is called transpiratation.

Q3. Urea is a waste produced in the process of the breaking down of:
(a) proteins
(b) carbohydrates
(c) fats
(d) sugar
Ans: (a)
Urea is a waste product in the process of breaking down proteins.

Q4. The thinnest blood vessels in the human body are:
(a) arteries
(b) capilharies
(c) veins
(d) any of these
Ans: (b)
Cappillaries are the thinnest blood vessels.

Q5. Blood platelets are responsible for:
(a) haemoglobin
(b) red blood cells
(c) white blood cells
(d) blood clotting
Ans: (d)
Blood platelets are responsible for blood clotting.

Q6. During transpiration water is lost from the plant in the form of:
(a) water vapour
(b) liquid
(c) hydrogen and oxygen gas
(d) steam
Ans: (a)
Water is lost from the plant in the form of water vapour during transpiratation.

Q7. Blood cells that protect the body from disease are:
(a) RBCs
(b) WBCs
(c) blood platelets
(d) all of these
Ans: (b)
WBCs protect us from diseases.

Q8. The device used to hear the heart beat is called a:
(a) thermometer
(b) stethoscope
(c) sphygmomanometer
(d) microscope
Answer: (b)
Stethoscope is used to the heart beat.

Q9. In the human urinary system, which of these in your opinion is the most important organ?
(a) kidney
(b) ureters
(c) urinary bladder
(d) urethra
Answer: (a)
Kidney is the most important organ in human urinary system.

Q10. Which of the following are the tiny filtering units of the kidney?
(a) ureters
(b) bladder
(c) nephrons
(d) urethra
Ans: (c)
Niphrons are tiny filtering units of kidney.

Q11. The average of adult blood pressure is:
(a) 110/90
(b) 110/80
(c) 120/110
(d) 120/80
Ans: (d)
The average of adult blood pressure is 120/80

Q12. Water is absorbed by the roots from the soil by a process is:
(a) translocation
(b) osomosis
(c) transpiration
(d) none of these
Ans: (b)
Water is absorbed by the roots from the soil is osomosis.

Q13. The fluid part of the blood is:
(a) cells
(b) veins
(c) plasma
(d) tissue
Ans: (c)
The fluid part of blood is plasma.

Q14. A liquid which carries disgerted food to various parts of our body is:
(a) pulse rate
(b) RBCs
(c) WBCs
(d) blood
Ans: (d)
Blood is a liquid which carries digested food to various part of the body.

Q15. Transportation of materials in human body is conducted by:
(a) digestive system
(b) excretory system
(c) circulatory system
(d) none of these
Ans: (c)
Transportation of materials in human body is conducted by excretory system.

Q16. The vascular tissue for that transports the food synthesised by the leaves to all parts of the plant is:
(a) Phloem
(b) xylem
(c) stomata
(d) root hairs
Ans: (a)
Food is carried from the leaves by pipes formed by pholem tissue.

Q17. Small pores in leaves of plants are called:
(a) stomata
(b) xylem
(c) Phloem
(d) root hairs
Ans: (a)
Small pores in leaves of plants are stomata.

Q18. Any two substances that are transported by blood:
(a) water, air
(b) water and oxygen
(c) oxygen, food
(d) none of these
Ans: (c)
Oxygen and food are two substances that are transported by blood.

Q19. Right side of heart has blood rich in:
(a) carbon dioxide
(b) oxygen
(c) haemoglobin
(d) can’t say
Ans: (a)
Right side of heart has blood rich in carbon dioxide.

Q20. Left side of heart has blood rich in:
(a) carbon dioxide
(b) oxygen
(c) haemoglobin
(d) none of these
Ans: (b)
Left side of heart has blood rich in oxygen.

Q21. Sea fishes excrete salt through their:
(a) lungs
(b) wings
(c) gills
(d) stomata
Ans: (c)
Sea fishes excrete salt through their gills.

Q22. Insects excrete uric acid in form of:
(a) liquid
(b) gases
(c) both a and b
(d) solids
Ans: (d)
Insects excrete uric acid in form of solids.

Q23. How much urine is passed in 24 hours by adult human being?
(a) 1-1.81 of urine
(b) 1-1.41 of urine
(c) 1-1.61 of urine
(d) 1-1.71 of urine
Ans: (a)
1-1.81 of urine is passed in 24 hours by adult human being.

Q24. An average person has a pulse rate:
(a) less than 75 per minute
(b) more than 75 per minute
(c) between 70-75 per minute
(d) none of these
Ans: (c)
An average person has between 70-75 per minute pulse rate.

Q25. The flow of blood is fastest in:
(a) arteries
(b) capillaries
(c) veins
(d) none of these
Ans: (a)
The flow of blood is fastest in arteries.

Q26. The wall of which of the following is thick and elastic:
(a) arteries
(b) veins
(c) capillaries
(d) none of these
Ans: (a)
The wall of arteries is thick and elastic.

Q27. The blood of which of the following is rich in carbon dioxide:
(a) arteries
(b) veins
(c) capillaries
(d) none of these
Ans: (b)
The blood of veins is rich in carbon dioxide.

Q28. Through walls of which of the following many substances can be exchanged:
(a) arteries
(b) veins
(c) capillaries
(d) none of these
Ans: (c)
Through walls of capillaries many substances can be exchanged.

Q29. Vessels having thin walls are:
(a) arteries
(b) veins
(c) capillaries
(d) none of these
Ans: (b)
Vessels having thick walls are veins.

Q30. Haemoglobin contains:
(a) Iron
(b) Iodine
(c) Calcium
(d) none of these
Ans: (a)
Haemoglobin contains iron.