Give scientific reasons:
$(1)$ Ascent of sap is done by $Xylem$ tissue.

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(N/A) The ascent of sap is the upward movement of water and dissolved minerals from the roots to the aerial parts of the plant.
$Xylem$ tissue is specialized for this function due to the following reasons:
$1$. It consists of tracheids and vessels which form a continuous pipe-like structure,facilitating the bulk flow of water.
$2$. The process relies on physical forces such as cohesive force (attraction between water molecules),adhesive force (attraction between water and $Xylem$ wall),and capillarity.
$3$. The transpiration pull,generated by the evaporation of water from leaves,creates a negative pressure that pulls the water column upward through the $Xylem$.

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Similar Questions

Which of the following are objections to the root pressure theory of ascent of sap in plants?
$I$. It is not applicable to plants taller than $20 \ m$.
$II$. Ascent of sap occurs even in the absence of a root system.
$III$. Root pressure is almost zero in tall gymnosperms.
$IV$. Root pressure is the only mechanism explaining the ascent of sap.
$V$. Root pressure is not developed in actively transpiring plants.

Guttation is caused by which of the following?

Which of the following forces plays a very important role in the ascent of sap in plants?

Which one is against the theory of ascent of sap given by Dixon and Jolly?

What force keeps two water molecules connected in the xylem?

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