1.6 Cell Division biology presentation.pptx

biology

1. Unit 1: Cell Biology Topic : 1.6 Cell Division Class: 10 B Lesson : Biology Duration : 60 min ________________________ Büşra Acaroğlu 07.10.2020

2. Essential Idea : Cell division is essential but must be controlled

3. Why do cells divide ? Remember large cells have a reduced SA:Vol ratio  less effcient than small cells ( The  rate of metabolism  of a cell is a function of its  mass / volume   (larger cells need more energy to sustain essential functions) The  rate of material exchange  is a function of its  surface area   (large membrane surface equates to more material movement) needs to produce more cells , each of them needs copy of the organism’s DNA Cell division : more growth more differentiation new cells for replacement ( death , damaged or infected cells )

4.  new cells are always necessary , so there is always need for MİTOSİS

5. Diploid  cells have two  homologous  copies of each  chromosome , usually one from the  mother  and one from the  father

6. https://www.wisc-online.com/learn/natural-science/life-science/ap13604/the-cell-cycle

7. I nterphase is a very active phase of the cell cycle with many processes occurring in the nucleus and cytoplasm

8. I nterphase is a very active phase of the cell cycle with many processes occurring in the nucleus and cytoplasm

9. Mitosis is division of the nucleus into two genetically identical daughter nuclei

10. Mitosis is division of the nucleus into two genetically identical daughter nuclei

11. Mitosis is division of the nucleus into two genetically identical daughter nuclei

12. Mitosis is division of the nucleus into two genetically identical daughter nuclei

13. Mitosis is division of the nucleus into two genetically identical daughter nuclei

14. What did we divide now ?  Nucleus What about the rest?

15. Mitosis is the division of the Nucleus Cytokinesis is the division of the cytoplasm and hence the cell The division of the cell occurs currently with – telophase Mitosis identical in plant and animal cells But cytokinesis is different Cytokinesis occurs after mitosis and is different in plant and animal cells

16. Cytokinesis occurs after mitosis and is different in plant and animal cells

17. http://www.biology.arizona.edu/cell_bio/activities/cell_cycle/activity_description.html Online Onion Root Tips

18. Chromosomes condense by supercoiling during mitosis

19. Chromosomes condense by supercoiling during mitosis

20. Cyclins are involved in the control of the cell cycle

21. Cyclins are involved in the control of the cell cycle

22. Mutagens, oncogenes and metastasis are involved in the development of primary and secondary tumours https://www.cancerresearchuk.org/about-cancer/what-is-cancer Tumors are abnormal growth of tissue that develop at any stage of life in any part of the body. A cancer is a malign tumour and is named after the part of the body where the cancer ( primary tumour ) first develops . most common types of cancers what causes canser and associated risk factors How cancer can be treated

23. Mutagens, oncogenes and metastasis are involved in the development of primary and secondary tumours

24. Mutagens, oncogenes and metastasis are involved in the development of primary and secondary tumours

25. Mutagens, oncogenes and metastasis are involved in the development of primary and secondary tumours

26. Mutagens, oncogenes and metastasis are involved in the development of primary and secondary tumours

27. Mutagens, oncogenes and metastasis are involved in the development of primary and secondary tumours

28. Mutagens, oncogenes and metastasis are involved in the development of primary and secondary tumours