Three test tubes are set up as shown. The indicator used here changes from red to yellow when exposed to increased levels of carbon dioxide. At the start of the experiment, the indicator in each test tube was red.
What will be the colour of the indicator in each test tube after two hours?
| a | b | c | |
| A | Yellow | Yellow | Red |
| B | Red | Yellow | Red |
| C | Yellow | Red | Red |
| D | Yellow | Yellow | Yellow |
Please explain how the test tube with insects will turn yellow.
Ans 4:
Class : Class 7
this is because the leaf produces oxygen during photosyntesis when exposed to sunlight