Question

2. Which seeds are used in the experiment to show that carbon dioxide is given out during respiration? *

Dry seeds

Boiled seeds

Germinating seeds

Crushed seeds​

Answer 1

KOH solution absorbs the CO2 released during respiration of seeds, which creates a partial vacuum in the conical flask, causing the rise in the water level of the U-shaped delivery tube. Rise in the level of water shows that CO2 is released during respiration.