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12th Class Biology Notes for All Chapters [With FREE PDF 2018]

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    • ##check## Chapter 14 - Respiration Notes
      • Size: 3 MB | Pages: 24
The area where gaseous exchange with the environment actually takes place is called the respiratory surface. Gaseous exchange takes place in all organisms by the physical process of diffusion - An Extraction from the Notes.

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    • ##check## Chapter 15 - Homeostasis Notes
      • Size: 4 MB | Pages: 33
Although Positive Feedback is needed within homeostasis, it also can be harmful at times. When you have a high fever it causes a metabolic change that can push the fever ' higher and higher. - An Extraction from the Notes.

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    • ##check## Chapter 16 - Support and Movement Notes
      • Size: 4 MB | Pages: 34
The thick filament which is about 16 mm in diameter is composed of myosin. Each .myosin molecule has tail terminating in two globular heads. - An Extraction from the Notes.

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    • ##check## Chapter 17 - Nervous Coordination Notes
      • Size: 5 MB | Pages: 36
Molar neuron get command from central nervous system or spinal cord for appropriate response according to stimulus this message is taken towards the effectors for response by means of motor neuron. - An Extraction from the Notes.

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    • ##check## Chapter 18 - Chemical Coordination Notes
      • Size: 3 MB | Pages: 24
Chemically, hormones are of three basic types i.e., steroids, amino acids or their derivatives, proteins or polypeptides and a few belong to the fatty acids e.g., prostanglandins. Steroid hormones are derivatives of cholesterol. - An Extraction from the Notes.

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    • ##check##Chapter 19 - Behavior Notes
      • Size: 3.18 MB | Pages: 25
When food is within 50-75 meters of the hive, the bee will do the round dance on the combs surface. When food is more than 75 meters from the hive, the bee will do the waggle dance. - An Extraction from the Notes.

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    • ##check## Chapter 20 - Reproduction Notes
      • Size: 2 MB | Pages: 18
An antisperm antibody test looks for special proteins (antibodies) that fight against a man's sperm in blood or semen. The test uses a sample of sperm and adds a substance only to affected sperm. Semen can cause an immune response in- either man's or woman's body.- An Extraction from the Notes.

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    • ##check## Chapter 21 - Development and Ageing Notes
      • Size: 4 MB | Pages: 34
An antisperm antibody test looks for special proteins (antibodies) that fight against a man's sperm in blood or semen. The test uses a sample of sperm and adds a substance only to affected sperm. Semen can cause an immune response in- either man's or woman's body.- An Extraction from the Notes.

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    • ##check## Chapter 22 - Inheritance Notes
      • Size: 6 MB | Pages: 49
The biological information in DNA is stored and coded in the sequence of its bases. The position on a chromosome where a gene is located is often referred to as a locus.- An Extraction from the Notes.

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    • ##check## Chapter 23 - Chromosome and DNA  Notes
      • Size: 5 MB | Pages: 39
A typical chromosome consists of two strands called chromatids; each is made up of a long DNA molecule which is highly coded along with histone proteins.- An Extraction from the Notes.

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    • ##check## Chapter 24 - Evolution Notes
      • Size: 3 MB | Pages: 27
The tissue which first influence inducing the development of a secondary embryo in the host. This termed this inductive event as primary induction, because he believed it to be the first inductive event in development. - An Extraction from the Notes.

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    • ##check## Chapter 25 - Man and his Environment Notes
      • Size: 5 MB | Pages: 37
Nitrogen gas is composed bf two atoms of nitrogen linked by a very strong triple bond. This makes it chemically nonreactive and large amounts of energy is required to break the bond- An Extraction from the Notes.

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    • ##check## Chapter 26 - Biotechnology Notes
      • Size: 6 MB | Pages: 50

The polymerase chain reaction (PCR) is a revolutionary technique in molecular biology which is used to amplify (cloning) a single gene or a piece of DNA into thousands to millions of copies. - An Extraction from the Notes.

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    • ##check## Chapter 27 - Biology and Human Welfare Notes
      • Size: 3 MB | Pages: 21
The biological information in DNA is stored and coded in the sequence of its bases. The position on a chromosome where a gene is located is often referred to as a locus.  - An Extraction from the Notes.

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Top Study World: 12th Class Biology Notes for All Chapters [With FREE PDF 2018]
12th Class Biology Notes for All Chapters [With FREE PDF 2018]
Are you looking for the 12th Class Biology Notes for Federal Board (FBISE)? You will never find better than these AMAZING notes. Download free now.
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