Nodule formation mechanism..

munch theory..mass flow hypothesis...pressure flow

Easy project list for class xii 19-20

12 bio project topics 19-20 EASY ..

1.  encephalitis
2.  stem cells-new avenues of life
3.  super bugs for plastic disposal
4. biodiversity of Western ghats
5.biomedical waste disposal
6 .drug addiction
7. human evolution
8. Gene therapy
9. organic farming need of hour
10. use of biotechnology in agriculture
11. DNA fingerprinting in forensic science
12. e waste disposal
13. autoimmune diseases
14. bioremediation
15. chromosomal disorders
16. Micropropagation of orchids

Chapter 6 anatomy of flowering plants

The cell/cytology questions

Plasma membrane.. Simplified singer and nicolson

Biology sample paper/CBSE/2019-20

https://drive.google.com/file/d/111WQj0cocf_FKDLQ_Istij96KB8rT1sO/view?usp=drivesdk
Above link is given ..Dear students ..u can download the Biology sample question paper..2019-20
https://drive.google.com/file/d/11NXJj1j0qFYpzXr3OVxWdWYzeeZA2jgI/view?usp=drivesdk
Marking scheme..of the above question paper..

Cell cycle and cell division questions

Biomolecules.. Questions

ERA-PERIOD-EPOCH animal evolution

Counter current mechanism

https://youtu.be/0ddqTYcBQcU

At a glance cockroach..

periplaneta.. Cockroach..

Connective tissue..

Connective tissue..flow chart..