Describe how water is carried by the transpiration stream (7)

Transpiration is the water loss from the plant via evaporation. The transpiration stream is the flow of water through the plant xylem from the roots to the leaves of the plant. Xylem are thin tubes where there is adhesion with water due to the polarity of water molecules. The water molecules also stick to each other in a process called cohesion due to polarity caused by hydrogen bonds. The water evaporates out from the spongy mesophyll cells and through the stomata. This water is replaced by water from the xylem via osmosis. This creates suction to pull through more water through the xylem resulting in the transpiration pull, due to the adhesion of water there is a constant transpiration stream. 

Related Biology IB answers

All answers ▸

Why should we care about conserving nature?


How can we reduce our impact on nature?


What is the difference between DNA and mRNA


Explain two examples of evolution in response to environmental change; one must be antibiotic resistance in bacteria.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences