TNPSC Free Notes Biology – Habitat – Various Habitats of Plants

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.

Habitat – Various Habitats of Plants

 The living Place of a plant provides food, shelter and suitable climate to

survive and Reproduce successfully. Such a place of living is called a
habitat.
 Plants live in different habitats such as water, land, desert, hills and so on.
Warming (1909):
Classified the Plants into three types on the basis of their water requirement.
They are
1. Hydrophytes
2. Mesophytes
3. Xerophytes
1. Hydrophytes:
Plants which Live in water are called hydrophytes. They are divided into three
types

a) Free-floating hydrophytes
E.g. Water hyacinth (Agayatamarai)
b) Attached floating hydrophytes
E.g. Water-lily (alli), Lotus.
c) Submerged hydrophytes
e.g. Vallisneria

Adaptations of Hydrophytes:
1. Root system is poorly developed. In some cases roots are even absent.
2. Stem is thick, short and spongy With air spaces to float in water
3. Leaves have a waxy-coat that prevents their decay in excess water.

2. Mesophytes:
 These plants grow in places with Moderate water supply.
 E.g. Wheat, maize, sunflower, Mango, neem.

Adaptations of mesophytes:
1. They have well developed root System.
2. Leaves are usually large and broad.

3. Xerophytes:
 The Plant body is adapted to cope with the water scarcity, high
temperature, Strong winds, etc.
 E.g. Opuntia (chappathikalli).
Adaptations of Xerophytes:
1. They have long roots which go Deep into the ground so as to absorb water.
2. In Opuntia, the stem is thick, flat and green and does the function of
photosynthesis.
3. Leaves are reduced or modified into spines to prevent the loss of water
from their surface.
Herbs and Shrubs:
Flowering plants can be grouped Based on their size of stem. They are herbs,

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