Cells & Heredity: Section 1.1 – Discovering Cells 6 th Science
Cells – the basic units of _____________ and ______________ in living things The microscope was invented around ________ and made it possible for people to discover and learn about cells Microscope – an ____________________ that makes small objects look larger All microscopes have at least one ___________ _____________ microscope – a light microscope that has more than one lens
Robert Hooke – one of the first people to observe _____________ Anton van Leeuwenhoek – first person to observe ____________ (he called them armalcules, meaning “little animals”) Matthias Schledein – concluded that all ____________ are made of cells Theodor Schwann – concluded that all _____________ are made up of cells Rudolf Virchow – proposed that all ___________ come from other cells
Cell Theory: All livings things are composed of ___________ Cells are the basic unit of ______________ and _________________ in living things All cells are ________________ from other cells
Microscopes Magnification: the ability to make things look ________________ than they are In a light microscope, lens or lenses _______________ an object by bending the light that passes through them Convex lens – a lens that has a ______________ shape where the center of the lens is thicker than the edges and is called a convex lens Because a compound microscope uses more than one __________, it can magnify an object even more
Resolution – the ability to clearly distinguish the individual parts of an object Electron microscopes – use a beam of ________________ instead of light to examine a specimen the resolution of electron microscopes is much better than the resolution of light microscopes