Cell organisation in plants
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This document summarizes the different cell types and tissues found in plant organs like stems, leaves, flowers, and roots. It describes the two main types of plant tissues - meristematic tissues found at growing tips that are made of small, dividing cells, and permanent tissues with specialized cell types. The three permanent tissue types are epidermal, ground, and vascular tissues. Epidermal tissue forms the outer protective layer. Ground tissue includes parenchyma, collenchyma, and sclerenchyma cells that provide structure and storage. Vascular tissue transports water and nutrients. In summary, the document outlines the basic plant cell and tissue types found in different plant structures and organs.
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This document discusses the movement of substances across the plasma membrane in cells. It covers the structure of the plasma membrane and the different mechanisms of transport, including passive transport mechanisms like simple diffusion, osmosis, and facilitated diffusion, as well as active transport which requires energy. Key differences between passive and active transport are that passive transport follows the concentration gradient and does not require energy, while active transport moves substances against the gradient and needs cellular energy.
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Question Are In The Book Of NCERT
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It's a PPT for chapter:- Tissue which is in science of class IX. Questions are from NCERT book of Science....
Please see to it .
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Thanks.
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- 2. Cell organisation in plants
- 3. TISSUES 1. Meristematic tissues 2. Permanent tissues Small cells – thin walls, large nuclei, dense cytoplasm and no vacuole Young, cell divide actively but not undergo differentiation at the tips of roots Epidermal tissues Ground tissues Vascular tissues
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- 6. Permanent tissue 2. Ground tissue • parenchyma – thin primary walls and large vacuole ; store sugar and starch ; gives support and shape to herbaceous plants.(leaf) • collenchyma – unevenly thickened cell walls; supports non-woody plants, young stems and petioles.(stem) • sclerenchyma – cell walls uniformly thickened by lignin and may be dead; give support and mechanical strength.(root)
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