the generation of life, form abiotic sources.
3.5 billion years old
.1-10 micrometers. Circular DNA known as plasmid floating cytoplasm. No membrane bound organelles. Very small ribosomes. Single celled organisms. Bacteria and Archea. The reproduction process is mostly asexual through binary fission, although it can occasionally sexually reproduce through conjugation.
10-100 micrometers. Linear DNA organized into chromosomes contained in a nucleus. Contains membrane bound organelles such as the nucleus, rough and smooth ER, and golgi apparatus. Large ribosomes. Mostly multicellular organisms. Protists, Fungi, Plants, and Animals. The reproduction process is always through sexual reproduction.
Hypothesized first cells by big time scientists. Have been found in rocks as old as 3.5 billion years.
Autotrophic modern prokaryotes that do not obtain their energy from the sun. They are exremophiles meaning they can live in extreme conditions.
Prokaryotes that evolved not long after the archaea.
The Endosymbiont Theory
When the Eukaryotic cells lived in association with prokaryotic cells then the relationship between the cells became mutually beneficial, and the prokaryotic symbionts became organelles in eukaryotic cells. This is the origin of chloroplasts and mitochondria.
(1588-1631) Created the 'first' compound microscope with the help of Hans.
Anthony van Leeuwenhoek
(1632-1723) improved the lenses of the microscope.
(1635-1703) improved the lenses of the microscope.
Magnifies the specimen image for the viewer.
Gathers light the light and it also magnifies and focuses the image that is inside the body tube. It also increases magnification (usually from 10x to 40x)
this is where the image focuses. The body tube holds the objective lenses and the ocular lens at the proper distance
Process of bending light
The objective (bottom) convex lens magnifies and focuses (bends) the image inside the body tube and the ocular convex (top) lens of a microscope magnifies it (again).
holds the objective lenses and can be turned to increase the magnification
These 2 clips hold the slide/specimen in place on the stage.
The Diaphragm controls the amount of light on the slide/specimen
Projects light upwards through the diaphragm, the specimen and the lenses. Some have lights, others have mirrors where you must move the mirror to reflect light.
Used to support the microscope when carried. Holds the body tube, nose piece and objective lenses
Supports the slide/specimen
Coarse Adjustment Knob
Moves the stage up and down (quickly) for focusing your image.
Fine Adjustment Knob
This knob moves the stage SLIGHTLY to sharpen the image
Supports the microscope