In the cross section the leaf, cuticle is the the outer most layers .pdf

aquacosmossystems 30 views 1 slides Jun 28, 2023
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About This Presentation

In the cross section the leaf, cuticle is the the outer most layers of leaf situated outside the
epidermis. The upper epidermis is in one cell thickness and contains the waxy cuticle outside.
The palisade parenchyma contains elongated cells and is part of mesophyll. The sponge
parenchyma contains ir...


Slide Content

In the cross section the leaf, cuticle is the the outer most layers of leaf situated outside the
epidermis. The upper epidermis is in one cell thickness and contains the waxy cuticle outside.
The palisade parenchyma contains elongated cells and is part of mesophyll. The sponge
parenchyma contains irregular shaped cells with large air spaces. The leaf veins occur in the
sponge parenchyma. The water and solutes travel through the leaf veins that contain the xylem
and phloem. The lower epidermis is also one cell in thickness and contains openings known as
the stomata through which the gaseous exchange takes place.
Palisade parenchyma contains columnar or elongated cells that are packed tightly and contain
several chloroplasts to trap sunlight more efficiently. These columnar cells with more number of
chloroplasts appear dark green in color and distribute the sunlight evenly throughout the leaf.
Thus, the light abdorbed on top surface by palisade parenchyma increase the amount of light
absorbed by the cells on the bottom of the leaf.

Solution

In the cross section the leaf, cuticle is the the outer most layers of leaf situated outside the
epidermis. The upper epidermis is in one cell thickness and contains the waxy cuticle outside.
The palisade parenchyma contains elongated cells and is part of mesophyll. The sponge
parenchyma contains irregular shaped cells with large air spaces. The leaf veins occur in the
sponge parenchyma. The water and solutes travel through the leaf veins that contain the xylem
and phloem. The lower epidermis is also one cell in thickness and contains openings known as
the stomata through which the gaseous exchange takes place.
Palisade parenchyma contains columnar or elongated cells that are packed tightly and contain
several chloroplasts to trap sunlight more efficiently. These columnar cells with more number of
chloroplasts appear dark green in color and distribute the sunlight evenly throughout the leaf.
Thus, the light abdorbed on top surface by palisade parenchyma increase the amount of light
absorbed by the cells on the bottom of the leaf.
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