1. In plants, exchange of gases takes place through A.Stomata B.Palisade tissue C.Spongy tissue D.Mid rib
Answer: Option A Solution: The exchange of oxygen and carbon dioxide in the leaf (as well as the loss of water vapour in transpiration) occurs through pores called stomata (singular = stoma). Normally stomata open when the light strikes the leaf in the morning and close during the night.
