Q. According to the transpiration-cohesion theory, the upward pull of water is transmitted to other water molecules by cohesion, which is caused by

A) Hydrogen bond
B) Hydrophilic cell walls
C) Turgor pressure
D) Osmosis
Explanation

Water is a polar molecule and forms hydrogen bonds between the positively charged hydrogen atoms and negatively charged oxygen atom. Hydrogen bonds make water molecules stick together, a process known as cohesion. When water molecules form hydrogen bonds with other molecules, such as carbohydrates, it is called adhesion. The hydrogen bonds have tension between them. So water molecules stick together and move together

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.