Biology Chapter 1

Front 1

freeze fracture

Back 1

technique in which tissue is rapidly frozen in liquid nitrogen then fractured for further treatment before microscopic examination.

Front 2

biogenesis

Back 2

accepted view that new cells are produced from existing cells.

Front 3

shadowing

Back 3

technique in which fractured pieces of specimen within a vacuole chamber are exposed to , and partly covered by heavy metal that is evaporated; the metal film reflects the contours of the parts that are covered and the parts are then covered with a layer of carbon atoms that is transparent to electrons. this speciman fragments are dissolved away leaving metal replicas that can be examined with an electron microscope.

Front 4

magnification

Back 4

enlargement of view of a specimen usually with a microscope.

Front 5

staining

Back 5

the addition of a colour to stain a compound in cells so we can see them.

Front 6

cell theory

Back 6

unifying theory of biology that indentifies all living things as being made of cells.