photographs of CBSE class 12 biology slides labelled

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This document contains descriptions and diagrams of stages of the human cell cycle and meiosis. It discusses structures in the human ovary including the corpus luteum, Graafian follicle, and secondary follicle. It also discusses structures in the human testis including the seminiferous tubule, sertoli cells, spermatogonia, and interstitial cells. The document further describes the stages of meiosis I including leptotene, zygotene, pachytene, diplotene, diakinesis, metaphase I, anaphase I, and telophase I. It also briefly mentions meiosis II and the parasites Entamoeba histolytica and Plasmodium.

Corpus luteum
Graafian follicle
ovum
Antrum
Secondary follicle
T.S of human ovary

SEMINIUFEROUS
TUBULE
SPERMATOGONIA
SPERMS
INTERSTITIAL CELLS
SERTOLI CELLS
T.S.OF HUMAN TESTIS

SHORTER
CROSS
SHAPED
CHROMOS
OMES
DIPLOTENE

REAPPEA
RANCE
OF
NUCLEA
R
MEMBR
ANE
DIAKINESIS

CHROMOSO
MES AT
OPPOSITE
POLES
ANAPHASE II

Aradhya Agrawal completed an investigatory project on reproductive health under the supervision of Mrs. Majinder Kaur. The project covered topics like population explosion, contraceptive methods, medical termination of pregnancy, sexually transmitted diseases, infertility, and assisted reproductive technologies. Mrs. Kaur certified that the project met expectations and guidelines. Aradhya thanked Mrs. Kaur for her support and guidance during the project.

Physics activity file class 12Titiksha Sharma

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To compare rate of fermention of give sampleRajsomvanshi

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Raj Somvanshi conducted an experiment to compare the rate of fermentation of wheat flour, gram flour, rice flour, and potato. Yeast and the enzyme diastase were used to ferment starch in the samples. The time taken for fermentation to complete was observed and recorded. Wheat flour fermented the fastest in 10 hours, while rice flour took the longest at 15 hours. Raj concluded that rice flour had the slowest fermentation rate.

Spotting copyArchanaUpmanyu

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Presence Of Oxalate Ions In Guava adharshvg

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This document outlines a chemistry experiment to study the presence of oxalate ions in guava fruit at different stages of ripening. The experiment involves extracting oxalate ions from guava pulp samples using dilute sulfuric acid, then titrating the solutions against potassium permanganate. Observations are recorded and calculations are shown to determine the normality and strength of oxalate ions in fresh, semi-ripe, and ripe guava samples. The results indicate that the content of oxalate ions increases with the ripening of the guava fruit.

Chemistry project for Class 12Shahban Ali

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This document appears to be a student's chemistry project report on studying the digestion of starch by salivary amylase and the effects of temperature and pH on this process. It includes sections on objectives, introduction, materials, procedures, observations, and conclusions for 3 experiments. The first experiment examines the digestion of starch by saliva over time. The second analyzes the impact of temperature. The third evaluates the impact of pH. The report was guided by a teacher and examines the student's investigation on how salivary amylase breaks down starch at different temperatures and pH levels.

Thermodynamics class 11SawarniTiwari

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Group E of Sanskar Public School completed a physics project on thermodynamics during the 2018-2019 academic year. The project was led by Sawarni Tiwari and included group members Manjeet Kumar, Shreya Tiwari, Mahwish, and Abhishek Singh. The project covered topics such as the laws of thermodynamics, heat and internal energy, state variables, processes like isothermal and adiabatic processes, and the work done in different processes. The principal and physics teacher certified that the project was the work of Group E and praised their initiative, cooperation, and the quality of their content and analysis.

project on EvolutionPradeep Ghora

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The document discusses human evolution from early hominids to modern humans. It describes several key species, including Ardipithecus ramidus dated to 4.4 million years ago, Australopithecus anamensis and A. afarensis dated to 4.1 and 3.18 million years ago. It also discusses debates around the transition from Homo erectus to Homo sapiens and models of modern human origins out of Africa versus multiregional evolution.

$To find the refractive indexes of (a) water,(b) oil using a plane mirror, an ...$ $To find the refractive indexes of (a) water,(b) oil using a plane mirror, an ...$

To find the refractive indexes of (a) water,(b) oil using a plane mirror, an ...AnkitSharma1903

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1. Ankit Sharma completed a physics project to determine the refractive indices of water and oil using a plane mirror, convex lens, and adjustable needle under the guidance of his teacher Mr. P.K. Sha. 2. The project involved using the lens formula to calculate the focal lengths of the convex lens alone and in combination with water or oil, then using these values and the radius of curvature of the lens to determine the refractive indices. 3. The refractive indices calculated were 1.0831 for water and 1.2886 for oil.

Chemistry Investigation Project (Daniel cell).sanjeebankrishna

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Chemistry Investigatory Project of class 12th CBSENagesh Agrawal

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This document appears to be a student project report analyzing the contents of different cold drink brands. It includes sections like the introduction, aim, theory, tests conducted to detect ingredients like carbon dioxide, glucose, phosphate, alcohol and sucrose. The results found that all drinks contained these ingredients. The conclusion compares the drinks and finds that Coca Cola is most acidic while Limca is least. Fanta contains the highest sucrose while Sprite has the most carbon dioxide. Potential disadvantages of cold drinks are also discussed.

To study the Presence of Oxalate Ions in Guava Fruit at different stages of R...VanshPatil7

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This document outlines a procedure to study the presence of oxalate ions in guava fruit at different stages of ripening. The procedure involves extracting oxalate ions from guava pulp samples using dilute sulfuric acid and titrating the solution with potassium permanganate. Observations show that the normality of oxalate ions and strength of oxalate increases with the ripening of guava, from 0.58 g/L in fresh guava to 0.61 g/L in fully ripened guava. The conclusion is that the content of oxalate ions grows with the ripening of guava fruit.

Physics activity file Class 12 - SakshamSaksham Mittal

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The document outlines the terms and conditions for a home loan agreement between a lender and borrower. It specifies details such as the loan amount, interest rate, repayment schedule, borrower obligations, default conditions, and foreclosure procedures. The lender agrees to provide a loan to the borrower to purchase a home, and the borrower agrees to repay the loan amount plus interest according to the payment schedule described.

Factors on which the internal resistance/emf of a cell dependsHarsh Solanki

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Chemistry project part 1 caseins in milk......AnuragSharma530

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Class 12th PHE Practical - 1 [SAI Khelo India Physical Fitness Test]kanishkmishra900

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chemistry investigatory project on to determine the rate evaporation of diffe...Vishal Sharma

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POLLINATION :Biology Investigatory projectNidhi Tayal

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The document summarizes types of pollination in plants. It discusses: 1) Self-pollination, which occurs within the same flower or between flowers on the same plant, promoting maintenance of parental traits. 2) Cross-pollination, which transfers pollen between genetically different flowers, introducing new traits but requiring external agents. 3) Biotic agents of pollination like insects, birds, and abiotic agents like wind and water that carry pollen grains from anthers to stigmas.

12th Biology Practical Spotting Q.4.pptxVishalBagde4

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This document provides details for a biology practical exam question on spotting. It includes descriptions of 10 spots (A-I for botany, G-J for zoology) that students must identify and comment on. Spot A involves identifying two plants (maize and salvia) and commenting on their floral adaptations for pollination. Spot B involves identifying and commenting on stages of meiosis. Spot C identifies and comments on techniques like emasculation, bagging, and tagging. Spot D identifies plants and comments on their xeric or aquatic adaptations. Spot E identifies plant pigments separated via paper chromatography. Spot F identifies and describes the vascular system of an anatropous ovule. Spots G-J identify

Class 12 Biology Investigatory Project CBSEDhananjay Dhiman

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Study on Acidity of Fruits and Vegetables JuicesVanshPatil7

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Vansh Patil conducted a study to test the acidity of various fruit and vegetable juices using pH paper. The juices tested included orange, apple, pomegranate, and guava. Most juices were found to be acidic, with pH values ranging from 2.8 to 4.5. Orange juice and pomegranate juice were the most acidic. The acidity is due to the presence of citric acid and phosphoric acid in the fruits. The study concluded that fruit juices are generally acidic in nature.

The Effect of Acids and Bases on the Tensile Strength of Fibres.VanshPatil7

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This is the Powerpoint Presentation for understanding theThe Effect of Acids and Bases on the Tensile Strength of Fibres. that will help to get the best idea about The Effect of Acids and Bases on the Tensile Strength of Fibres. It will also help in the Chemical Engineering Branch. It is made in a simplified format that will help the viewers to understand it easily. Please look forward to it and let down your thoughts on it. Thank you so much. Happy Learning!!

Preparation Of Soy Milk And Its Comparison With Natural Milk Class XII Chemis...Deepak Bhandari

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Biology investigatory projectKavita Kulkarni

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This document is a student's biology investigatory project on cancer biology. It includes an index listing the topics covered, such as the description of human cancer cells, differences between healthy and cancer cells, cancer cell division, causes of cancer, cancer types and symptoms, cancer treatment, and acknowledgments and bibliography. The project provides information on the basic biology of cancer, how cancer cells differ from healthy cells, common types and symptoms of cancer, and standard cancer treatments.

Physics project class 12Pranav12109

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Presentation on Poem Analysis of My Mother At Sixty- SixRAKSHITDOGRA1

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The document provides an analysis of the poem "My Mother at Sixty-Six" by Kamala Das. It summarizes the poem, which describes the poet's feelings seeing her aging mother's face in the car on the way to the airport. It analyzes several aspects of the poem, including themes, vocabulary, and poetic devices. The analysis concludes that the poem touches on the beautiful relationship between mother and daughter.

english class 11 projectAyushKumar901181

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The document is a project report submitted by a student named Ayush Kumar for their class 11 English class. It includes a title page with signatures, an acknowledgment section thanking the teacher for guidance, and 6 sections about various aspects of daily life, agriculture, trade, education, writing systems, and technology in Ancient Egypt. Each section includes 1-2 paragraphs of information and some include related images. The project report provides an overview of different topics related to society and culture in Ancient Egypt.

STAGES OF MITOSIS IN ONION ROOT TIPAsha Gopalakrishna

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Class 12 bio chapter 2 ppt by asha gopalakrishnaAsha Gopalakrishna

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This document discusses sexual reproduction in flowering plants. It describes the structures and processes of microsporogenesis and megasporogenesis, which produce microspores and megaspores through meiosis. The microspores develop into pollen grains, and the megaspore develops into the embryo sac. Fertilization occurs when a pollen tube delivers sperm to the embryo sac, resulting in the fusion of gametes and formation of a zygote. The document contrasts the differences between microsporogenesis and megasporogenesis, and discusses self-incompatibility and techniques like emasculation and bagging used to facilitate controlled pollination.

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