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136-150: MCQs for General Science for Govt. Exams (UPSC and SSC)
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In this lesson, Dr. Roman Saini will discuss the MCQs related to various topics in General Science from Class 6 to Class 8 (Science) NCERT.

Roman Saini is teaching live on Unacademy Plus

Roman Saini
Part of a great founding team at Unacademy with Gaurav, Hemesh. Movies, Guitar, Books, Teaching.

U
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maam rights of buyers ka bh lesson bna dijye...sale of goods act m!! plz
good bless you Roman. What you have done for public service is recommendable.
Q> how do dolphins breathe when they sleep A> Dolphins have to be conscious to breath. This means that they cannot go into a full deep sleep, because then they would suffocate. Dolphins have "solved" that by letting one half of their brain sleep at a time. This has been determined by doing EEG studies on dolphins.
Ans of Q149 is wrong...i think ans should be butter paper. Butter makes the paper translucent. Wood is opaque. Nice basic and important questions though. Good job.
Navneet Gupta
2 years ago
No....Answer is correct. please check in NCERT also.
Divya Madiya
2 years ago
ques is which one is not translucent.... wood is not translucent.... ans is right ..reread the ques
Ans of Q149 is wrong...i think ans should be butter paper. Butter makes the paper translucent. Wood is opaque. Nice basic and important questions though. Good job.
  1. 0136. Adaptation is a a. Short term phenomena. b. Long term phenomena c. Disability to an organism d. Sudden process


  2. Answer: b Explanation: Self-explanatory


  3. 0136. Which of the following is better suited to the desert habitat? a. b. Nocturnal animals Bears c. Short animals d. Fibrous plants


  4. Answer: b Explanation: Desert life is less harsh during the night.


  5. 0137. Which of the following animals is adapted to cold habitat? a. Tiger b. Yak C. Lion d Camel


  6. Answer: b Explanation: Yak has thick coat of hairs to protect it from the cold.


  7. 0138. Why do trees found in mountains have a cone shape? a. For protection from sun. b. For protection from winds c. So that snow can slide off easily over the branches d. So that they attain more height


  8. Answer: c Explanation: Self-explanatory


  9. Q140. Which of the following organisms show adaptation? 1. Plants 2 Animals 3 Microorganisms Choose the correct code a. b. 2 only 1 only C. 2 and 3 only d. 1,2 and 3


  10. Answer:d Explanation: All organisms show adaptation


  11. 0141. Which of the following organisms do not have gills? 1. Whales 2. Dolphin:s 3. Fishes Choose the correct code. a. 1 only b. 2 only c. Both 1 and 2 d. All of these have gills


  12. Answer: c Explanation: whales and dolphins don't have gills.


  13. Answer:d Explanation: whales and dolphins don't have gills. They breathe in air through nostrils or blowholes that are located on the upper parts of their heads. This allows them to breathe in air when they swim near the surface of water. They can stay inside the water for a long time without breathing. They come out to the surface from time to time, to breathe in air. long time withoutcome out to the surface from


  14. Q144. Why are leaves narrow and often divided in aquatic plants? a. Because need for food is low in such plants. b. Because such plants do not make their food regularly. c. To offer minimum resistance to the flowing water. d. Aquatic plants have broad leaves mostly.


  15. Answer: a Explanation: The process of getting rid of waste materials produced in the body is called as excretion while as the process of removal of undigested food from the body is called egestion.


  16. Q147. Which of the following is absent in plants? 1. Locomotion 2. Movement 3. Sexual reproduction Choose the correct word. a. 1 only b. 1 and 2 only c. 2 and 3 only d. 1, 2 and 3


  17. Answer: a Explanation: Plants show movements such as opening and closing of flowers, flowers following the sun's direction, etc. Plants can reproduce sexually as well as asexually.


  18. Q148. Which of the following is a luminous object? a. Sun b. Moon c. Mirror. d. Inverter


  19. Q149. Which of the following is not a translucent object? a. Wood. b. Butter paper. c. Glass. d. Plastic.


  20. Q150. The following is not an insulator? a. Rubber. b. Wood. c. Glass. d. Metal.


  21. Answer:d Explanation: Insulators do not allow electric current to pass through them.