My teacher used these exact questions. Lazy! The answeres are:
1.Robert Hooke:
--ca. 1657: Began to study the pendulum and worked on improving pendulum mechanisms; recorded that he conceived of a way to determine longitude (then a critical problem for navigation), and with the help of Boyle and others he attempted to patent it. In the process, Hooke demonstrated a pocket-watch of his own devising, fitted with a coil spring attached to the arbour of the balance.
--1633 and 64: Produced his microscopial observations; later became "Micrographia," the first book describing observations made through a microscope. First person to use the word "cell" to identify microscopic structures when he was describig cork
--Also invented: The iris diaphragm in cameras; the universal joint in motor vehicles; the balance wheel in a watch
--1676: First stated Hooke's law (http://en.wikipedia.org/wiki/Hooke%27s_l…
--1679: Designed the Royal College of Physicians
Zacharias Janssen
--ca. 1595: Invented the microscope with the help of his father Hans
Anton van Leeuwenhoek
--1674: Discovered infusoria (protists in modern zoological classification
--1676: Discovered the bacteria (e.g. large Selenomonads from the human mouth)
--1677: Discovered the spermatoza
--1682: Discovered the banded pattern of muscular fibers
Matthias Schleiden
--1838: Wrote "Contributions to Phytogenesis" in which he stated that the different parts of the plant organism are composed of cells. Thus, Schleiden and Theodor Schwann became the first to formulate what was then an informal belief as a principle of biology equal in importance to the atomic theory of chemistry.
Theodor Schwann
--1837: Regarding digestion: showed that it depends essentially on the presence of a ferment he called pepsin.
--Also discovered the organic nature of yeast
Source(s):
http://en.wikipedia.org/wiki/Robert_Hook…
http://inventors.about.com/library/inven…
http://micro.magnet.fsu.edu/optics/timel…
http://en.wikipedia.org/wiki/Antonie_van…
http://en.wikipedia.org/wiki/Matthias_Ja…
http://en.wikipedia.org/wiki/Theodor_Sch…
2 years ago
2. The microscope was nessisary for the cell theory to develope. Without the mocroscope we could not see these very very small cells.
3. Schleiden was a German Bioliogist; in 1838 he suggested the idea that all plants must contain cells. In 1839 Schwann, a German biologist, followed up with the idea that all parts of animals are made of cells. He made 3 statements:
a. The entire animal or plant is composed of cells or of substances secreted by cells. Thus, all living things are made of cells.
b. Cells form by free-cell formation, similar to the formation of crystals.
c. The cell is the unit of structure and function of all living things.
Two of these statements are still valid; one is not. c. is incorect; a scientist named Virchow proved this statement wrong. Cells do not form by free formation.
4. The inventors of the microscope directly affected the cell theory. A Dutch lens maker, anton Von Leeuwenhoed invented the first microscope. Rober Hooke invented the first compound microscope. After these discovories many more scientests invented many different microscopes that are used in different ways to get better results.
5. a. plants are made of cells. b. animals are made of cells. c. Cells cannot form from a non-living substance.
