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नवीनतम संदेश 7

2021-08-27 20:05:06 Biology handwritten notes

Chapter 1 Anatomy in flowering plants
https://drive.google.com/file/d/1U7fTzBxBTzfZ0CFyl6yspLmBZcsjGBWD/view

Chapter 2 Morphology of flowering plants
https://drive.google.com/file/d/1nPaCXk096xjlbOX11cG28y2iK2taaMWK/view

Chapter 3 Digestion and absorption
https://drive.google.com/file/d/124Mpp-PNsZnFQZoAVxbslCOFpMK5vFIa/view

Chapter 4 chemical control and coordination
https://drive.google.com/file/d/1uQXOGpy0Xg_wczjdE1ObltblSY3tCagF/view

Chapter 5
Mineral nutrition
https://drive.google.com/file/d/1tRHcoIfzXFvW9i0M4gPRZkoS4UajRt/view

Chapter 6 Molecular basis of inheritance
https://drive.google.com/file/d/10nrVQMwa6KQpP4n6HBvJ71g9FantVarU/view

Chapter 7 Plant growth and development
https://drive.google.com/file/d/1GydS0FlvCvY-EUSIzKqe7qdHfE2Pf5Nf/view

Chapter 8 Principal of inheritance and variation
https://drive.google.com/file/d/1U9rmpSWktYrzSYMRN_J0mLRUxAp81dgu/view

Chapter 9 Transport in plants
https://drive.google.com/file/d/1PFHFVkFcJkfs8o-5-cft1Spszqw9ydR-/view

Chapter 10 Biodiversity and conservation
https://drive.google.com/file/d/1xhwceWQMUoNyAE8vTTAR0dO7jt-pwnNy/view

Chapter 11 Biotechnology and its application
https://drive.google.com/file/d/1J8SOjSgz17YGJEiLc4x3YbvycpbMP7la/view

Chapter 12 Cell the basic unit of life
https://drive.google.com/file/d/157hZHL2kvW0c2r2Kgks8ua0xRKJFumvZ/view

Chapter 13 Cell cycle and division
https://drive.google.com/file/d/1dv57xADvPIMh8aOrQr1M2jQuRB_p457b/view

Chapter 14 Ecosystem
https://drive.google.com/file/d/15MHsFTxQ2TRoy8ojdMwrxHU8TpVpQvNR/view

Chapter 15 Evolution
https://drive.google.com/file/d/11fcEuFUbY3a3L1r0xQi7hq5TaU4kDy/view

Chapter 16 Photosynthesis
https://drive.google.com/file/d/1Y7_aWHOYbZHEPtg9vIo9L0Ot1Izs6jTQ/view

Chapter 17 Stratagies of enhancement in food production
https://drive.google.com/file/d/1gsM9-S1GWomtlwC-zt9pR_H6-Iv92djE/view

Chapter 18 Reproductive health
https://drive.google.com/file/d/1-RhWWDRX_vwc05SDDvt0Ez612W295STP/view

Chapter 19 Human Reproduction
https://drive.google.com/file/d/1sQxvb-epXnUYkt38N6BWsL8bu8IHbX-3/view

Chapter 20 Locomotive and movement
https://drive.google.com/file/d/11kXJ3X2FQoaw7j4pwODDyIZm2vvmReeb/view

Chapter 21 Neural control and coordination
https://drive.google.com/file/d/1UizIjU0j2brHf5taMiSKhQ4_yTyQ3VFJ/view

Chapter 22 Organism and population
https://drive.google.com/file/d/12GLgYDIosl_LmU8ZtGdx4wFkeP4UtyWc/view

Chapter 23 Excretory products and its elimination
https://drive.google.com/file/d/19umqU16yKaNUWxJtkpzQ7WI944goCePD/view

Chapter 24 Human health and diseases
https://drive.google.com/file/d/1iuYA13LaSVdyS3DTIFXkS9aJqp_JuLd7/view

Chapter 25 Environmental issues
https://drive.google.com/file/d/1l1C9_CLTP63eEtR1gYj-95M5SAORQFJs/view

Chapter 26 Living World
https://drive.google.com/file/d/0B9nP9YTmQrZkYi01eHV3Ml9FOTA/view

Chapter 27 Biological classification
https://drive.google.com/file/d/0B9nP9YTmQrZkeHBoNTBJcS1SOFE/view

Chapter 28 Biomolecules
https://drive.google.com/file/d/0B9nP9YTmQrZkOU9KZTNOYWM4VzQ/view

Chapter 29 Respiration in plants
https://drive.google.com/file/d/0B9nP9YTmQrZkazRNSHV1NHpnNjQ/view

Chapter 30 Body fluids and circulation
https://drive.google.com/file/d/0B9nP9YTmQrZkMHJzRmtpQ00xVzg/view

Chapter 31 Breathing and exchange of gases
https://drive.google.com/file/d/0B9nP9YTmQrZkcVM1YU5MYlNmWEk/viewhttps://drive.google.com/file/d/0B9nP9YTmQrZkcVM1YU5MYlNmWEk/view

◎ ─━──━─❖─━──━─ ◎

3.6K views17:05

ओपन / कमेंट

2021-08-27 19:12:49

Doubtnut ke Study Channels par ab sirf Instant doubt solving hi nahi
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168 views16:12

ओपन / कमेंट

2021-08-27 12:14:04 Important Scientists & their theories frm Molecular Basis

1) Fredrick Griffith (1928) - Transformation Principle

2)Avery,Mcleoid &Maclarty (1933-44) - Neither Protein Nor Rna its Dna

3)Harshy Chase(1952) - Bacteriophage exp

4)Maselson &Sthal -Semi cons model of rep(prokaryotes)

5)Taylor -Vicia Fabea Plant (Eukaryotes)

6)Willkins - X ray Crystallography

7)Rosen & Franklin -Helical st of Dna

8)Watson & Crick(1953) -Double helical Dna

9)Crick - Central Dogma

10)Benzer - Benzer Model of Dna (Cistron,Recon ,Muton)

11) Jacob & Monad (1961) - Lac Operon

12)Nirenberg & Khorana - cracking of genetic code

13)Nirenberg - Dicephering Of Codon

14)Hugo De Varies - Mutation Theory

15)Holley - Clover leaf Model

16)Gammow - Codon Is Triplet

Join us for more

1.3K viewsedited 09:14

ओपन / कमेंट

2021-08-26 19:02:53

2.0K views16:02

ओपन / कमेंट

2021-08-26 12:31:07 #Revision

Important Notes - Electrochemical Cells

► An electrochemical cell can convert electrical energy to chemical energy and can also convert electrical energy to chemical energy. There are two types of electrochemical cells- Galvanic cell and Electrolytic cell.

► Cathodes are usually metal electrodes. It is the electrode where reduction takes place. The cathode is the positive electrode in a galvanic cell and a negative electrode in an electrolytic cell. Electrons move into the cathode.

► A half-cell is half of an electrochemical cell (electrolytic or galvanic), where either oxidation or reduction occurs. At equilibrium, there is no transfer of electrons across the half cells. Therefore, the potential difference between them is nil.

► A salt bridge is a device used to connect the oxidation and reduction half-cells of a galvanic cell (a type of electrochemical cell). Strong electrolytes are generally used to make the salt bridges in electrochemical cells. Since ZnSO4 is not a strong electrolyte, it is not used to make salt bridges.

► Emf of a cell is equal to the maximum potential difference across its electrodes, which occurs when no current is drawn through the cell. It can also be defined as the net voltage between the oxidation and reduction half-reactions.

► Cell potential is an intensive property as it is independent of the amount of material present. Gibbs free energy is defined for an electrochemical cell and is an extensive property as it depends on the quantity of the material.

► Electrode potential is the tendency of an electrode to accept or to lose electrons. Electrode potential depends on the nature of the electrode, temperature of the solution and the concentration of metal ions in the solution. It doesn’t depend on the size of the electrode.

► The salt bridge connects the two half-cell solutions to complete the circuit of the electrochemical cell. The electrolytes of the salt bridge are generally prepared in agar-agar or gelatin so that the electrolytes are kept in a semi-solid phase and do not mix with the half-cell solutions and interfere with the electrochemical reaction.

► A salt bridge is a junction that connects the anodic and cathodic compartments in a cell or electrolytic solution. It maintains electrical neutrality within the internal circuit, preventing the cell from rapidly running its reaction to equilibrium.

► A Voltaic or Galvanic cell is a type of electrochemical cell that converts chemical energy into electrical energy. Photovoltaic cells are used to convert light energy into electrical energy. An Electrolytic cell is a type of electrochemical cell that converts electrical energy into chemical energy. A fuel cell is an electrochemical cell that converts the chemical energy of a fuel and an oxidizing agent into electricity.

► For all spontaneous chemical reactions, the change in Gibbs free energy (ΔG°) is always negative. For a spontaneous reaction in an electrolytic cell, the cell potential (E°cell) should be positive.

► In an electrochemical cell, when an opposing externally potential is applied and increased slowly, the reaction continues to take place. When the external potential is equal to the potential of the cell, the reaction stops. Once the externally applied potential is greater than the potential of the cell, the reaction goes in the opposite direction and the cell behaves like an electrolytic cell.

► Primary cells cannot be used again and again. Since there is no fluid inside, these cells are also known as dry cells. The internal resistance is high and the chemical reaction is irreversible. Their initial cost is cheap.

► A secondary battery (a series of cells) is one which can be charged, discharged into a load, and recharged many times. Nickel-cadmium cell, Lead storage cell and Mercury cell are examples of secondary cells. Leclanche cell is an example of a primary cell.

2.4K views09:31

ओपन / कमेंट

2021-08-25 18:29:38

2.6K views15:29

ओपन / कमेंट

2021-08-24 20:08:32

Maths Formulae

Trigonometry, Algebra

468 views17:08

ओपन / कमेंट

2021-08-24 19:18:58

722 views16:18

ओपन / कमेंट

2021-08-24 12:15:32 Mnemonics

FUNCTION OF SERTOLIC CELLS

BIMA PENS

1) B- blood testis barrier .
2) I - inhibits hormone secretion (FSH).
3) M- mullerian inhibiting substance .
4) A - androgen binding protein synthesis .
.

5) P- phagocytosis of dead or abnormal sperm.
6) E - estrogen synthesis .
7) N- nourishment of sperm
8) S - spermiation .

1.9K views09:15

ओपन / कमेंट

2021-08-23 19:33:58