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Saturday, October 4, 2014

The classification of the plants according to the external shape and their way of reproduction

There are enormous diversity in the living organisms , So , They must be classified into groups to facilitate their studying . We can classify the plants according to the external shape and the way of the reproduction .

 

The plants classification according to the external shape 

 

You should know that the plants are classified according to the external shape into :

 

Some plants can not distinguished into the roots , the stem and the leaves such as algae ( green , red and brown algae ) .


Red algae
The red algae .

 

Some plants are distinguished into the roots , the stems and the leaves such as the maize ( the corn ) , the wheat , the palms and the camphor plants .

Wheat plant
Wheat plant .

 

The plants classification according to their way of reproduction 

 

You should know that the reproduction of the plants is by the formation of the spores and the formation of the seeds .


 

It is very important to know that there are plants reproduce by the formation of the spores ( the ferns ) , And the ferns are small terrestrial plants such as the vougheir and the adiantum .

Adiantum
Adiantum

 

You should know that there are plants which reproduce by the formation of the seeds , And they are divided into the gymnosperms and the angiosperms ( the flowering plants ) .

 

It is very important to know that the seeds of the gymnosperms are formed inside the cones and not inside a pericarp ( the fruit envelope ) such as the pine and the cycas plants .

 

You should know that the seeds of the angiosperms are formed inside a pericarp , and they are divided into :

 

The monocotyledon plants such as the maize and the wheat plants .

 

The dicotyledon plants such as the beans and the pea plants .

 

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