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MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS- XI, CHAPTER-1 Cambrian Education Group “ Total Education For All” শশশশ শশশশ শশশশ শ শশশ শশশ শ শশশশশ শ শশশ শশশ শশশশ শশশ শশশশ শশশশ শশশশশ শশশ শশশ শ শশশশ শশশ

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  1. 1. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All
  2. 2. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All
  3. 3. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All
  4. 4. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All
  5. 5. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All
  6. 6. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All
  7. 7. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All Basis of Classification The important criteria used in classification is called basis of classification. 1.Germ layers 2.Body size 3.Number of cell 4.Symmetry 5.Coelom 6.Metamerism 7.Presence or absence of vertebral column. 8.Habitat
  8. 8. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All (Germ Layers)
  9. 9. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All Amoeba proteus Spongilla fragilis 1.Non layered: 2.Single layered:
  10. 10. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All Hydra vulgaris Homo sapiens. 3.Diploblastic : Body wall 2 layered ectoderm & endoderm eg :- Coelenterates with an undifferentiated mesoglea layer in between 4.Triploblastic: body wall 3 layered ectoderm & endoderm & mesoderm : eg Platyhelminths
  11. 11. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All (Symmetry)
  12. 12. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All Symmetry Symmetry applies to the arrangement of body parts with reference to some axis of body. Animals that are irregular in shape are asymmetrical. Animals that are regular in shape are symmetrical.
  13. 13. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All (Spherical symmetry)
  14. 14. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All (Radial symmetry) Star fish
  15. 15. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All (Bilateral symmetry)
  16. 16. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All (Asymmetry)
  17. 17. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All ) Volvox globator
  18. 18. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All (Metamerism)
  19. 19. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All 1.Absence of metamerism some animals, the body is externally and internally divided into segments with a serial repetition of at least some organs. For example, in earthworm, the body shows this pattern called metameric segmentation and the phenomenon is known as metamerism.
  20. 20. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All 2.Similar
  21. 21. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All 3.Dissimilar
  22. 22. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All (Coelom)
  23. 23. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All (Acoelomate)
  24. 24. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All -(Pseudocoelomate)
  25. 25. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All - (Eucoelomate)
  26. 26. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All Coelom: The space between alimentary canal and body wall which is covered by peritoneum membrane is called coelom.
  27. 27. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All eeectoderm endoderm mesoderm
  28. 28. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All ectoderm mesoderm endoderm pseudocoelom
  29. 29. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All eucoelom ectoderm mesoderm endoderm
  30. 30. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All Body size: 1.Microscopic
  31. 31. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All 2.Large
  32. 32. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All Plasmodium vivax Number of cell: 1.Unicellular
  33. 33. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All 2.Multicellular
  34. 34. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All On the basis of vertebral column 1.Invertebrate
  35. 35. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All 2.Vertebrate
  36. 36. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All
  37. 37. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All
  38. 38. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All
  39. 39. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All
  40. 40. MD. KAWSAR ALI HAWLADER,LECTURER OF BIOLOGY, CLASS-XI, CHAPTER-1 Cambrian Education GroupTotal Education For All

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