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  1. The cell was first discovered and named by Robert Hooke in 1665.
  2. Robert Brown discovered the nucleus of a cell.
  3. Matthias Schleiden, found that all plant tissues are composed of cells and that an embryonic plant arose from a single cell.
  4. Theodor Schwann developed the cell doctrine that all living things are composed of cells.
  5. “Every cell arises from another cell.” was said by Rudolf Virchowdx
  6. Chromatin is a mass of genetic material composed of DNA and proteins that condense to form chromosomes during eukaryotic cell division. Chromatin is located in the nucleus of our cells.
  7. The nuclear membrane keeps your DNA inside the nucleus to protect it from surrounding substances in the cytoplasm.
  8. Eukaryotic cells are cells that contain a nucleus and organelles, and are enclosed by a plasma membrane.
  9. Chromoplasts are found in fruits, flowers, roots, and stressed and aging leaves, and are responsible for their distinctive colors.
  10. Tonoplast is the membrane that surrounds the central or large vacuole of the plant.
  11. The seasons are caused as the Earth, tilted on its axis, travels in a loop around the Sun each year.
  12. The 180th degree meridian is also called the anti-meridian. It is used to define the International Date Line.
  13. Earth comes closest to the sun every year around January 3. It is farthest from the sun every year around July 4.
  14. June 21 is the longest day of the year for the Northern Hemisphere as sun reaches its northernmost point. The earth’s north pole tilts directly towards the sun
  15. December 22 is the shortest Day of the Year in the Northern Hemisphere.
  16. The movement of earth on its axis is called rotation. Revolution is the movement of the Earth around the Sun.
  17. The change between day and night is caused by the rotation of the Earth on its axis.
  18. Sun rises in the east as earth rotates from west to east.
  19. India is 5 hours and 30 minutes ahead of Greenwich time.
  20. Greenwich Mean Time or GMT is clock time at the Royal Observatory in Greenwich, London. It is the same all year round and is not affected by Summer Time (Daylight Saving Time) clock changes.

Read also: https://careercore.in/the-dead-speaks-after-3000-years.html

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