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PLANT CELL STRUCTURE
LEAF PALISADE CELL
It is a typical plant cell. Its function is to carry out photosynthesis. They
are adapted to carry out its function in many ways:-

Long, thin cells that form
a continuous layer to
absorb sunlight
Contains lots of
chloroplast that arrange
in the best…

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Granal membranes provide a large surface area for the attachment of
chlorophyll, electron carriers and enzymes that carry out first stage of
photosynthesis
Fluid of stroma possesses all the enzymes needed to carry out the second
stage of photosynthesis
Chloroplast contains both DNA and ribosomes so they can quickly and…

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When a "young" plant cell is formed, it is surrounded by a primary cell wall
composed largely of cellulose. The cell wall is secreted by the protoplast it
encloses. This primary cell wall consists of cellulose fibres arranged at random
within the matrix such that the primary wall is highly…

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Root hair cells
Root hair cell is an extension of a root epidermal cell. They are exchange surfaces
in plants that are responsible for intake of water and mineral ions. Root hairs
absorb water by the process of osmosis. The concentration of ions inside the root
hair cell is normally…

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Starch, glycogen and cellulose

Starch
Starch is a polysaccharide that is found in many parts of plants such as small
grains, seeds and storage organs. It is made up of glucose
monosaccharide linked by glycosidic bonds that are formed by
condensation reaction. The unbranched chain is wound into a tight…

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The cellulose molecules are grouped together t form microfibrils whcih in turn are
arranged in parallel groups called fibres.

Cellulose ia a mjor component in cell
walls. This provides rigidity and also
prevents cells from bursting due to
osmotic movement of water. It does this
by exerting an inward pressure…

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CELL DIFFERENTIATION AND ORGANISATION

Cell differentiation
Single celled organisms perform all essential life functions inside the boundary of
a single cell, but they are not efficient at all of them. Each function requires a
different cell structure. No one cell can provide the best conditions for all
functions.

Each cell…

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Organ systems
Organs work together as a single unit known as organ system.
These systems may be grouped to perform particular functions more efficiently.
For e.g

The digestive system digests and processes food
The respiratory system is used for breathing and gas exchange
The circulatory system pumps and circulates blood

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