notes for class 7 in the chapter tissue
Answers
Answer:
group of cell is make tissue
Explanation:
tissue is use to make organ so without tissue we cant exisst
Explanation:
Tissues
Organisation - organisation is a manner in which smaller units of any struction or system are arranged into larger units in an hierarchical fashion.
Levely of Organisatation
Biosphere
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Ecosystem
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Community
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Population
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Organisms
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Organ system
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Organ
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Cells
Levels of organisation lower to organism
1). Molecular level
atoms →molecules→ Compounds →Organelles →cell
2). Cellular level
3.Tissue level- marks the beginning of division of labour
4. organ level
5. organ system level
*Tissues*- a group of same kind of cells performing the same function
Plant tissues
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Merismatic tissues Permanent tissues
Merismatic tissues- formed of actively dividing young cells
Characters of merismatic tissues are
Oval - small, have thin wall
No intercellular space
large nuclei in center
Vacuoles absent or small.
Function-> Helps in growth.
All new organs arises dy the new formed by of meristem the division
Has three types apical lateral and intercalary meristem