A pressure created by active secretion of salts and other solutes from other cells into xylem sap is called___________?
Correct answer: B. Root pressure
- A. Transpiration pull
- B. Root pressure
- C. Osmotic pressure.
- D. None of these
Explanation
Root pressure develops when root cells actively accumulate salts in the xylem, lowering the xylem water potential and drawing water into it by osmosis. Students may choose transpiration pull, but that is the tension generated mainly by evaporation from leaves, not positive pressure produced in roots.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Biological Importance of Water
Water supports life through its polarity, hydrogen bonding and ability to dissolve ionic and polar substances. Its high specific heat, heat of vaporization, cohesion, adhesion and incompressibility help regulate temperature, transport materials and maintain structure, while hydrolysis and osmosis depend directly on water.
Practise Biological Molecules
1,790 free Biological Molecules MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Biological Importance of Water questions
Stomatal transpiration is __________ of total transpiration
___________ function as multisensory hydraulic valve?
The opening and closing of stomata is directly controlled by the___________?
Lenticels look like__________?
Aerating openings formed in the bark through which exchange of gases takes place and water is lost in the form of vapours are___________?
Lenticular transpiration is ___________ of total transpiration?