| ⇦ | 
| ⇨ |
The repture and fractionation do not usually occur in the water column in vessel / tracheids during the ascent of sap because of
Options
(a) lignified thick walls
(b) cohension and adhesion
(c) weak gravitational pull
(d) transpiration pull
Correct Answer:
cohension and adhesion
Explanation:
The repture and fractionation do not usually occur in the water column in vessel / tracheids during the ascent of sap because of cohension and tension. The water molecules have a great mutual attraction with each other or in other words we can say that they have tremendous cohesive power which is sometimes as much as 350 atmospheres. Thus, the transpiration pull develops a negative pressure in the uppermost xylem cells. It is transmitted from there into the xylem of stems, and from there into the xylem of s
Related Questions: - Which of the following is correctly stated as it happens in the common cockroach ?
- Bacterial leaf blight of rice is caused by a species
- Cambium activity is highest in
- HIV codes for the gene (s)
- Person with blood group AB is considered as universal recipient because he has:
Topics: Plant Physiology
(28)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following is correctly stated as it happens in the common cockroach ?
- Bacterial leaf blight of rice is caused by a species
- Cambium activity is highest in
- HIV codes for the gene (s)
- Person with blood group AB is considered as universal recipient because he has:
Topics: Plant Physiology (28)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply