A microscope is an instrument which makes an object appear bigger than it is. It took the invention of this relatively simple tool to lead to the discovery of cells<span>. In the 1660s, Robert Hooke began using microscopes to look at all sorts of materials. Anton van Leeuwenhoek took up similar work in the 1670s.</span>
The Galactic Center or Galactic Centre is the rotational center of the Milky Way, it is a super massive black hole
The start from an are of high concentration to an area of low concentration until it's evenly spread out
The organelle the question is referring to is called the chloroplast. I hope this helps; have a good evening!
