) Draw the diagrams of Animal Cell and Plant Cell. Write the differences between
them. What are the constituents of Phloem and Xyle. Select the following features
of Phloem and Xylem.
Features
Xylem
Phloem
Cell Walls: Thick/Thin
Cells: Living/Dead
Function
Direction of Flow
Cytoplasm: None/Yes
Permeablity
Answers
Answer:
A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane.
Explanation:
XYLEM :The structural elements of xylem are tracheids, vessels or tracheae, xylem fibres, xylem parenchyma and rays. The tracheid is derived from a single cell and can be regarded as the basic cell type of xylem tissue.
Phloem : Phloem tissue consists of conducting cells, generally called sieve elements, parenchyma cells, including both specialized companion cells or albuminous cells and unspecialized cells and supportive cells, such as fibres and sclereids.
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Explanation:
Animal cell and plant cell both are strictly eukaryotic in nature.
1. Animal cells are soft and flexible cells due to the absence of cell wall. whereas the plant cells are rigid due to thick cell wall, made of cellulose.
2. Plant cells contain plastics, which are used in photosynthesis and storage of food material. In animal cells, plastics are not found, so they cannot perform photosynthesis.
Cytoplasm
= In both animals and plant cells cytoplasm is present.
Xylem
These are the main complex tissue of the plant, which perform the function of water and mineral transport. Along with the phloem tissues these form the vascular bundles. It consists four elements :
1. Tracheids 2. Vessels 3. Xylem fibre 4. Xylem parenchyma
Phloem
Phloem tissues are also complex tissues which are used to transport food and solute through the plant body. Along with the xylem elements these are also the part of vascular bundles. It consists of four types of elements :
1. Sieve cells/tubes 2. Companion cells 3. Phloem fibres 4. Phloem parenchyma
Unlike xylem, phloem conducts the food in both directions (upward and downwards)
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