What makes sap go up a tree?
One theory ascribes it to osmotic pressure. Liquids and dissolved substances pass through membranes in living things. This is called osmosis. Dissolved chemicals in contact with a membrane press against it. This is osmotic pressure. Yet another holds that it is because of transpiration and the cohesion of water. Evaporation of water from leaves is transpiration. The attraction between water particles is cohesion.
Related posts:
Do you know “HauzKhas, old and new”.
Do you know
Which is the biggest polar mammal? Complete General Knowledge Question and Answer for Class 6, 7, 8,...
General Knowledge
Who discovered heredity? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11...
General Knowledge
GK Question "How The Coins Got Their Names?" general knowledge book English 2021 current affairs qui...
General Knowledge
Who invented printing? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 a...
General Knowledge
Why do people blink their eyes? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9,...
General Knowledge
Do you know "A game of virtues and vice".
Do you know
Do winds have different names? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, ...
General Knowledge
Was Persia rich? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and 12 ...
General Knowledge
GK Question "Do You Know, That A Cow Chews Its Cud?" general knowledge book English 2021 current aff...
General Knowledge
What is colour blindness?Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11...
General Knowledge
Do you know “Saffron Festival, Pampore”.
Do you know
GK Question "Why, There Are Three Different Kinds Of Hair?" general knowledge book English 2021 curr...
General Knowledge
How did music originate? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11...
General Knowledge
GK Question "When And How Did The Custom Of Kissing Start?" general knowledge book English 2021 curr...
General Knowledge
Do you know “Measuring the earth's diameter”.
Do you know
Do you know “Earliest known inscriptions”.
Do you know
Do you know “Travancore Maharaja's bed”.
Do you know
What is the universe made up of? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9...
General Knowledge
Why is the bald eagle called so? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9...
General Knowledge
