Transpiration - Why do cacti have spines? | скачать в хорошем качестве

Transpiration - Why do cacti have spines? |

Topic: Transpiration Why do cacti have spines? Maybe they want to look like porcupines. Very funny. Spines help cacti to reduce transpiration. Well. I know all about vibration, but what's this new thing called transpiration? Transpiration is the loss of water from ariel parts, like stems and leaves, in the form of water vapor. These ariel parts contain stomata which allow water vapor to escape into the atmosphere. So, shall we tape the ariel parts so that the vapor won't escape? Pay attention. In deserts, where cactus usually grows, there is scarcity of water. Also, due to high temperatures, the rate of transpiration is very high. Thus, the leaves of a cactus have modified into spines. Spines don't have stomata. Thus, the rate of transpiration is reduced, helping the cactus to save water.