Ascent of Sap

IMPORTANT

Ascent of Sap: Overview

This topic covers concepts, such as, Ascent of Sap, Root Pressure Theory, Vital Force Theory & Physical Force Theory etc.

Important Questions on Ascent of Sap

HARD
IMPORTANT

Which of the following helps in ascent of sap?

MEDIUM
IMPORTANT

Xylem sap is made up of 

HARD
IMPORTANT

Which tissue is responsible for upward movement of the water during the ascent of sap in the plant?

MEDIUM
IMPORTANT

Which of the following is/ are vital force theories related to ascent of sap?

EASY
IMPORTANT

Plants absorb water from the soil and transmit it to various organs by_____

EASY
IMPORTANT

Select the odd one out:

EASY
IMPORTANT

The forces which contribute to the upward movement of sap:

EASY
IMPORTANT

What is responsible for guttation?

EASY
IMPORTANT

A column of water within xylem vessels of tall trees does not break under its weight because of

MEDIUM
IMPORTANT

Choose the correct match given in Column I with their role given in Column II.

Column I Column II
Root hair Wilting
Stomata Guttation
Hydathode Transpiration
Xylem vessels Ascent of sap

MEDIUM
IMPORTANT

Cohesion theory of ascent of sap is based on

EASY
IMPORTANT

Which of the following is more during the night ?

EASY
IMPORTANT

Ascent of sap in plants explains

EASY
IMPORTANT

Sap in xylem flows out through the cut end of the well-watered stem of a plant, this phenomenon is called:

EASY
IMPORTANT

The continuation of excretion of watery liquid for some time from the stem of a well-watered plant, after cutting off the shoot slightly above the base, is due to

EASY
IMPORTANT

Root pressure can be measured by means of:

EASY
IMPORTANT

Ascent of sap refers to the movement of water from

EASY
IMPORTANT

The movement of materials through the vascular tissue of plants is called

MEDIUM
IMPORTANT

Root pressure on a tree is typically about 2-6 atm. This is sufficient to raise the water level up to a few feet. Tall trees get water at the top due to:

HARD
IMPORTANT

In an experiment to monitor the ascent of sap, the following treatments were carried out to a twig dipped in water. In which case wilting will be observed?