Respiration in Organisms: Class 7 Science Q&A · Page 2
23 free answers on Respiration in Organisms (Science) for Class 7 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- ScienceClass 7CBSE
Take three test tubes. Fill ¾th of each with water. Label them A, B and C. Keep a snail in test tube A, a water plant in test tube B and in C, keep both the snail and plant. Which test tube would have the highest concentration of CO2?
Solution: Test tube A will have the highest concentration of CO2 because test tube A has a snail which expels out CO2 into the tube. Since a plant is present in both test tubes B and C, the plant will inhale CO2 to decrease CO2 concentration. Thus, there will be less concentration of CO2 in these tubes.
- ScienceClass 7CBSE
2. List the similarities and differences between aerobic and anaerobic respiration.
Solution: Similarities: In both kinds of respiration, food particles are broken down to release energy Both occur inside the cells Both supply by-products Differences Aerobic respiration <stron
- ScienceClass 7CBSE
Why does an athlete breathe faster and deeper than usual after finishing the race?
Solution: Athletes need a lot of energy during the race, and for the release of energy, they need a lot of oxygen; hence they breathe faster than usual after finishing the race.