The rupture and fractionation do not usually occur in the water column in

⇦

⇨

The rupture 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 rupture 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 o

Related Questions:

1. Halophytes are peculiar in having
2. Select the correct statement with respect to diseases and immunisation?
3. In which of the following all three are macronutrients
4. Consider the four statements (A-D) related to the common frog Rana tigrina
5. One of the most important function of botanical gardens is that

Topics: Transport and Nutrition in Plants (163)
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