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In some higher plants, the cuticle is a water-impervious protective layer covering the epidermal cells of leaves and other parts and limiting water loss. It consists of cutin, a waxy, water-repellent substance allied to suberin, which is found in the cell walls of corky tissue.
In addition to its function as a permeability barrier for water and other molecules (prevent water loss), the micro and nano-structure of the cuticle confer specialised surface properties that prevent contamination of plant tissues with external water, dirt and microorganisms.
The presence of the cuticle limits water loss, but also inhibits absorption of carbon dioxide and excretion of oxygen.

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Practical

Posted by Shankar Lamjel 7 years, 5 months ago

CBSE > Class 11 > Biology

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Write about fischer projection rule?

Posted by Princy Doll 7 years, 5 months ago

CBSE > Class 11 > Biology

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Suggest easy n beautiful project for biology exhibition...plzz??

Posted by Anshu Malik 7 years, 5 months ago

CBSE > Class 11 > Biology

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Anshu Malik 7 years, 4 months ago

Today was my exhibition n i made this model....n really i got full attention of the guests

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Anshu Malik 7 years, 4 months ago

N place these baby made with clay in diyas.each diya will represent the uterus

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Anshu Malik 7 years, 4 months ago

Stages of foetus development......take 6 stands and use diyas ......place these diyas on the stand....in tilt position n make different shapes of foetus according to stages with clay.

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Rashi Ah 7 years, 5 months ago

Wildlife

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Anshu Malik 7 years, 5 months ago

Model not project srry??

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Kingdom monera class 11

Posted by Youphel Bhutia 7 years, 5 months ago

CBSE > Class 11 > Biology

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Harshita Pandey 7 years, 5 months ago

This kingdom is of all prokaryotes. It has two group (1) archaebacteria &(2) is eubacteria. They may be unicellular or multicellular. Cell wall may be present or absent. They found in everywhere. Eg. Bacillus(rod shaped), vibrio cholerae( comma shaped ) e.t.c.

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Skeletal system

Posted by Khushi Rai 7 years, 5 months ago

CBSE > Class 11 > Biology

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Describe the life cycle ( alteration of generation ) of gymnosperm

Posted by Dev Anandhan 7 years, 5 months ago

CBSE > Class 11 > Biology

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Describe the alteration of generation seen in pteridophytes

Posted by Dev Anandhan 7 years, 5 months ago

CBSE > Class 11 > Biology

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Write the economic importance of pteridophytes

Posted by Dev Anandhan 7 years, 5 months ago

CBSE > Class 11 > Biology

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Yogita Ingle 7 years, 5 months ago

Economic Importance of Pteridophytes:

1. Ornamental value: Ferns arc grown as ornamental plants in gardens and homes for their attractive foliage.

2. Drug, Rhizomes and petioles of Dryopteris yield an antihelminthic drug.

3. Food. Sporocarps of Marsilea are rich source of starch and eaten for their nutritive value as food.

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Plant genrally groth

Posted by Arunendra Dwivedi ( Piyush ) 7 years, 5 months ago

CBSE > Class 11 > Biology

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Name the different classes of pteridophyta and define them.

Posted by Akarsh Tiwari 7 years, 5 months ago

CBSE > Class 11 > Biology

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What is phylogenetic relationship

Posted by Bhawna Yadav 7 years, 5 months ago

CBSE > Class 11 > Biology

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Akarsh Tiwari 7 years, 5 months ago

Phylogenetic relationship” refers to the relative times in the past that species shared common ancestors. Two species (B & C) are more closely related to one another than either one is to a third species (A) if, and only if, they share a more recent common ancestor with one another (at Time 2) than they do with the third species (at Time 1).

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What is pore

Posted by Kartik Saini 7 years, 5 months ago

CBSE > Class 11 > Biology