Published on: Mar 3, 2016
Transcripts - Kingdom monera
Kingdom MoneraMonera are the only kingdom composed of prokaryotic organismsThe major group of this kingdom is the bacteria that have a cell wall, andlack both membrane- bound organelles and multi-cellular forms Bacteria may be solitary cells, filamentous, or colonial, Aerobic or anaerobic, Autotrophic or heterotrophicOther groups of Monera include the cyanobacteria (autotrophic) andeubacteria (heterotrophic)The Archaebacteria, the most ancient of this kingdom, are so different thatthey may belong to a separate kingdom
1. Size• Bacterial cells are very small,• about 1-2µm in diameter and 10 µm long – One micrometer = 1/1000 mm. • Imagine looking at a dime from its thinnest side and trying to slice it into a thousand pieces; that is the same as 1 µm.
Shapes of Prokaryotes • Cocci = spherical (round) • Bacillus = (rod shaped) • Spirilla = helical (spiral)
Shapes3 basic shapes SpiralCocci - sphere This spiral shaped Bacilli - rods bacteria is the causitive agent of Spirilla – spirals syphilis Treponema pallidum Rod shaped Streptococcus sp. Chains of nearly-2 basic groupings spherical bacteria. From The Rockefeller SphericalStaph - in clusters University. Strep - in chains
Bacterium Shapes• Cocci~ Sphere shaped bacteria• Bacillus~ Rod shaped bacteria• Spirrillium ~ Spiral shaped bacteria• Flagella~ Leg-like structures that help to propel the bacterium.
2. Lack membrane-bound organellesinside the cell
3. have few internal structures that are distinguishable under a microscope.
4. genetic information is in a circular loop called a plasmid • E. coli cell dividing. • E. Coli Grows in human intestine; – Has a single, circular chromosome – contains DNA as plasmids • Plasmids are extra- chromosomal DNA
5. Strong cell walls: resistant to environmental changes