Showing posts with label growth. Show all posts
Showing posts with label growth. Show all posts

Monday, May 13, 2013

Bacteria notes continued

On Saturday we discussed the ways bacteria can grow. Remember they grow by binary fission!

What are the 3 ways bacteria can share genetic material? (Transduction, Transformation, and Conjugation)
Can you explain each of the 3 ways?


How do we know natural selection has acted on antibiotic resistance in bacteria?
1. Heredity - bacteria inherit the plasmid where the genes for resistance are found
2. Variability - resistance vs. non-resistance
3.Selective Pressure - Antibiotic
4. Differential Survival and Reproduction - In the presence of antibiotics (In the environment), if the bacteria has a gene for resistance it will survive and reproduce. 


Bacteria shapes:

How bacteria grow?
Example of a lawn

Example of colonies