1. How do sigma factors control cellular differentiation in Bacillus? 2. How wou

Question

1. How do sigma factors control cellular differentiation in Bacillus?

2. How would you test whether or not a species is capable of and uses chemotaxis?

3. Do you think that group selection affects evolution of natural populations? Why or why not? trait is cooperative? why?

5. What is frequency-dependent fitness?  

6. How does spatial structure affect competition and cooperation?

7. Why do endosymbionts tend to have very small genomes?

8. Why might scientists apply economic theory to understanding mutualisms and how they trade resources?

Explanation / Answer

1)In bacillus subtilis the specificity of target DNA dependent RNA polymerse is due replacable sigma factors.

sigA:household sigma factor

SigB:stress related

SigD: chemotaxis and motility genes

SigE: early mother cell-specific sporulation

SigF: early forespore-specific sporulation

SigG: late forespore-specific sporulation

SigH: It controls genes of the transition phase

SigK: late mother cell-specific sporulation

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