BIOL130 Lecture Notes - Homeostasis, Acidophile, Animalcule
19 Feb 2013
School
Department
Course
Professor
Document Summary
Viewed slices of cork cellula" little rooms. Worked with glass -> huge improvement in quality of lenses, and nearly 300x magnification then became possible. He was the first to observe: single celled organisms called animalcules". However, progress was stalled for a century or so: this was because we had a limited resolving power, and we had emphasis more on description than explanation. 1830"s came up with the compound microscope: improved magnification and resolution, and allowed the visualization of objects that were less than 1microns. 1933 robert brown (botanist) jnoticed that every plant cell contained a round structure, a kernel" and called it a nucleus. All plant tissues are composed of cells. Embryonic plant always arose from a single cell. 1839 theodor schwann (zoologist) similar observations in animal cells: recognition of structural similaties, btw plants and animals! All organisms consist of one or more cels. The cell is the basic uni of structure for all organisms.
