BIOL 1002 Chapter : Chapter 19 Bio 1002
Document Summary
Unicellular is almost always too small to see. Microtubes: too small to be seen clearly without a microscope. We know most about e. coli: single-celled, prokaryotic, small size. =the period" at the end of a sentence is about 1000 um. 12000 species described, may be 100-1000x that number. 1st organisms to appear on earth, 3. 9 to 4. 1 billion years ago. Capsules: large, highly organized, and firmly attached to cell wall. Slime layers: large, less organized, and loosely attached to cell wall: semi-rigid.
