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Biology ( Chapter-2, 9th Class )

In 1665, an English biologist Robert Hooke invented first compound microscope and observed the sections of corks and leaves under this microscope. He noticed in them small box like chambers of same size which he called "cells". After this, biologists observed different organisms under the microscope. They found that structure of cells was complex.

In 19th century, the compound microscope was highly advanced and biologists observed things just a micrometer apart. After this, a series of discoveries started, which provided basic information for cell theory.

1. In 1831 - 33, Robert Brown discovered nucleus in cells of plants.

2. In 1838, a German botanist Mathias Scheiden observed that all plants were made up of cells.

3. In 1839, Theoclor Schwann obsrved that the bodies of of animals were made up of cells which were similar to plant cells.

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24 Comments

  • sir i need class 9th notes of biology chapter 1 and with diagram and good example avalible or not
    zakir khan on 03-07-2011 at 06:47:39 commented
  • bio notes 9th class
    HAMMAD on 25-07-2011 at 12:59:53 commented
  • sir i need class 9th notes of biology chapter 2 with diagram and good example avalible or not
    malika urooj on 09-08-2011 at 07:48:14 commented
  • sir,I need biology chapter 2 notes of class 9th class with diagrams.
    AbdulAzimKhan on 21-10-2011 at 01:09:02 commented
  • i need whole chapters diagram
    abdullah on 15-12-2011 at 11:38:25 commented
  • sir plzzzzzzzzzzzzz i need whole chapters notes of biology 4 class 9th 2012
    jennifer on 04-01-2012 at 12:41:13 commented
  • sir i want biology notes of all chapters of 2012 9th class punjab board
    muhammad azeem on 15-04-2012 at 12:00:50 commented
  • sir mujhe anser chy 2nd chapter k with example
    NASIR ALI on 25-04-2012 at 12:41:34 commented
  • answers
    nasir ali on 25-04-2012 at 12:42:53 commented
  • PLZZZZZZ I NEED 3RD AND 4TH CHAPTER PLLZZZZZZZZZZZ
    ALI on 25-04-2012 at 03:33:08 commented
  • SIR I NEED WHOLE CHAPTER OF BIOLOGY SIR IN OUR CROUSE THERE ARE 18 CHAPTER IN BIOLOGY (SINDH BOARD)IAM FROM UBAURO IN SCHOOL KIDS GARDEN PUBLIC HIGHER SECONDARY SCHOOL UBAURO
    Mansoor Ali on 31-05-2012 at 03:54:09 commented
  • sir i need all chapters of biology with diagram and with examples
    mubasharshah on 13-06-2012 at 09:34:04 commented
  • sir,the whole of tests are good.I learnt much from these..
    rohit lund on 24-06-2012 at 02:21:18 commented
  • Excuse me Sir, I need Biology 2nd Whole chapter.
    Zia on 02-07-2012 at 01:06:11 commented
  • SALAM!! I WANT MARKED 10 YEARS FOR BIOLOGY STUDENTS CLASS NINE ND WHERE R OTHER CHAPTERS NOTES????????? I AM CHOOSED PK STUDIES IN ENGLISG CAN U TELL ME SELECTED QUESTIONS THNKX
    mifrah rahat on 08-08-2012 at 06:43:22 commented
  • Salammmmmm.....i want to whole chapter notes of class 9..
    Alma on 09-01-2013 at 07:39:15 commented
  • SIR HOW YOU ?SIR MUJY 9TH CLASS KY NOTES CHAEYE PLZ GIVE ME NOTES THANKS
    bheemraj kumar on on 11-01-2013 at 10:19:29 commented
  • sir can u gv me notes of frst chapter of bio study of life and biodiversity
    princess muqaddas on 22-04-2013 at 09:03:57 commented
  • sir can you send me notes of chp 9 of bio transport
    ayan on 11-07-2013 at 05:56:58 commented
  • sir plz i want 2nd chapter notes of 9 class i need immidiatly plz plz plz
    popakrajput on 12-07-2013 at 11:30:38 commented
  • i want 2nd chapter msqs of ninth class plz give me if everyone can this
    Princess Nadia on 16-08-2013 at 01:48:17 commented
  • @Princess Nadia: have you tried this page on moalims http://www.moalims.com/mcqs/9th-class-multiple-time-choice-question.aspx , There are many MCQS
    Naveed on 16-08-2013 at 07:10:35 commented
  • sir i want a short answers of chp 2
    sania on 10-11-2013 at 01:27:29 commented
  • good
    wasildahri on 17-11-2013 at 12:26:07 commented

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