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What Are Important Diagrams For Class 12 Biology Board Exam PDF Free Download, कक्षा 12 जीव विज्ञान बोर्ड परीक्षा के लिए महत्वपूर्ण डायग्राम क्या हैं ?
Biology Is A Crucial Topic For Students In The 12th Grade, Especially For Test Success. The Class 12 Curriculum Includes 16 Chapters In Biology. Included Are The Most Crucial Diagrams From Previous Year’s Test Questions And The Diagrams That Are Most Often Questioned. There Are 13 Diagrammatic Examples Present. Before A Test, Students May Like These Diagrams.
There Are Several Diagrams That Are Important For The Class 12 Biology Board Exam. Here Are Some Of The Key Ones:
It Is Important To Practice Drawing And Labelling These Diagrams To Be Well Prepared For The Class 12 Biology Board Exam.
बोर्ड परीक्षाओं में, एक स्वच्छ, लेबल वाला ग्राफ़िक बनाने से आपको अंक प्राप्त करने में मदद मिल सकती है। एक आरेख अधिक उपयोगी है और प्रभावी ढंग से जानकारी देता है। एक छवि अधिक संवाद कर सकती है। यहां आपके लिए कक्षा 12 की बोर्ड परीक्षाओं के अध्ययन के लिए कुछ महत्वपूर्ण डायग्राम दिए गए हैं।
यहां आपको 2020 सीबीएसई कक्षा 12 जीव विज्ञान बोर्ड टेस्ट के लिए महत्वपूर्ण आरेख मिल सकते हैं। कक्षा 12 जीव विज्ञान एनसीईआरटी पाठ्यपुस्तकों से आरेख-आधारित प्रश्न बोर्ड परीक्षाओं में लगातार प्रस्तुत किए गए हैं। इस वर्ष के लिए सीबीएसई कक्षा 12 जीव विज्ञान बोर्ड टेस्ट 14 मार्च, 2020 को निर्धारित किया गया है।
यदि आप हाल ही में कक्षा 12 के जीव विज्ञान के सैंपल पेपर (सीबीएसई द्वारा जारी) को देखते हैं, तो आप देखेंगे कि कई प्रश्न एनसीईआरटी पाठ्यपुस्तकों के आरेखों और आलेखों पर आधारित हैं।
ऐसे कई डायग्राम हैं जो कक्षा 12 जीव विज्ञान बोर्ड परीक्षा के लिए महत्वपूर्ण हैं। यहाँ कुछ प्रमुख हैं:
कक्षा 12 जीव विज्ञान बोर्ड परीक्षा के लिए अच्छी तरह से तैयार होने के लिए इन आरेखों को बनाने और लेबल करने का अभ्यास करना महत्वपूर्ण है।
The male reproductive system consists of the following:
The female reproductive system consists of the following:
A typical microsporangium appears circular in outline and is surrounded by four walls:
Spermatogenesis is a process in which diploid spermatogonia undergo meiosis to produce haploid spermatids.
The process of formation of a mature haploid female gamete from the diploid oogonium is called oogenesis.
The cross between two homozygous individuals differing in two characters is called dihybrid cross.
It’s a phenomenon in which the F1 hybrid exhibits intermediate characters of the parental gene.
The transcription unit of DNA contains three regions in the DNA:
S L Miller and H C Urey performed an experiment in 1953 for chemical evolution.
He created electric discharge in a closed flask containing CH4, H2, NH3 and water vapours at 800 oC.
After few weeks he observed the formation of amino acids and complex molecules like sugars, nitrogen bases, pigments and fats in the flask.
Conclusions:
Antibodies are protein molecules called immunoglobulins (Ig) and are of five typesIgA, IgM, IgE, IgG, and IgD.
An antibody has a Y-shaped structure.
Each antibody molecule consists of four polypeptide chains, two are long called heavy (H) chains while the other two are short called light (L) chains. Hence, an antibody is represented as H2L2.
IgG is the most prevalent antibody in the blood followed by IgA and IgM.
IgA is present in breast milk (colostrum).
Bioreactors are vessels of large volumes (100-1000 liters) in which raw materials are biologically converted into specific products.
Gel electrophoresis is a technique for separating DNA fragments based on their size and net electric charges.
pBR322 is the first artificial cloning vector developed in 1977 by Boliver and Rodriguez from E. coli plasmid.
A cloning vector ha the following features;
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