TNPSC Free Notes Biology – Herbs and Shrubs

இந்தக் கட்டுரையில், TNPSC குரூப் 1, குரூப் 2, குரூப் 2A, குரூப் 4 மாநிலப் போட்டித் தேர்வுகளான TNUSRB, TRB, TET, TNEB போன்றவற்றுக்கான  முறைகள் இலவசக் குறிப்புகளைப் பெறுவீர்கள்.தேர்வுக்கு தயாராவோர் இங்குள்ள பாடக்குறிப்புகளை படித்து பயன்பெற வாழ்த்துகிறோம்.

Herbs and Shrubs:

Flowering plants can be grouped Based on their size of stem. They are herbs,
shrubs and trees.

1. Herbs:
 Small plants with soft and Green stems are called herbs.
 They are non-woody plants and do not grow more than One meter in
height.
E.g. Radish, wheat, paddy, sunflower
2. Shrubs:
 Medium sized plants
 They do not have a clear main stem.
 They tend to branch and become Bushy.

 E.g. Rose, jasmine, croton, Tulsi, Lemon.

Parts of a Plant:
 Roots, Stem, Leaves and Flowers
Root system:
 Tap root system: e.g. Mango, neem, carrot, radish, etc.
 Adventitious root system: e.g. Rice, grass, maize, bamboo.
Leaf & Normal functions of leaf:
 Synthesis of Food
 Exchange of Gases
 Transpiration
Flower:
Flower is called the reproductive Part of a plant because it helps in sexual
Reproduction.

A flower has four parts:-
 Calyx
 Corolla
 Androecium – It is the male part of the flower
 Gynoecium: It is the female part of a flower
Kurinji is a rare flower that blooms once in 12 Years. It is endemic (found only) to
Tamil Nadu.

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