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Chapter 6.     Practical Notebook Biology Standard XII Chapter number six study of suspense particular matter in the air and different sites in your area If I am going to tell the exam, then let's start with the video, which you can see and write here by downloading its answer in both image and PDF, then what you have to do first is to go to Google Chrome and search here here you will find In this way, one will open in front of you, now what you have to do is click on it, there is a search box here. After clicking on the box you have to search here So here you have to search, the study of suspending, all you have to search is that you can't watch the video properly, and that's why you can't get the answer, if you see it correctly, then you will know what to search. After clicking on it, you can write all the answers and if you want only one chapter, then after searching so much, you will find the page of the news channel here, here you have to click on the loan mode.

Practical Notebook Biology Standard XII Biology  Answeres Practical Notebook Standard XII Class-12th science Click here download in PDF T.S.  Testis: Date Internal structure of testis shows the presence of tunica albuginea and seminiferous tubules.  Testis 6. Study of T. S. testis, T. S. ovary, and V. S. of blastula, through permanent slides.  Is externally covered by fibrous connective tissue called tunica albuginea.  It is internally covered by tunica vascularis formed by capillaries and externally by an incomplete covering called tunica vaginalis.  Seminiferous tubules are lined by cuboidal germinal epithelial cells.   It shows different stages of spermatogenesis lic spermatogonia, primary and secondary spermatocytes, spermatids, and sperms.  Few large pyramidal cells are present interrupting germinal epithelia are nurse cells or Sertoli cells.  Sperm bundles get attached to Sertoli cells with their heads.  The function of Sertoli cells is to provide nourishment to the sperms till