Answer:
a. methylation at lysine 9 or 27 of histone H3.
Explanation:
Methylation causes the switching off of genes using steric hinderance to prevent access to DNA.
Answer:
1. Diptheria
2. Tetanus
3. Pertussos (whooping cough)
4. Poliomyelitis (Polio)
5. Measles
6. Mumps
7. Rubella
8. Haemorphilus Influenzae type b infections
etc...
<em>hope this helps you!</em>
Interesting question.
"They are prokaryotes" - YES, both bacteria and Archaea are considered prokaryotes
"They reproduce by binary fission" - YES, but keep in mind (in case your teacher drops this on you in a quiz or exam) that Archaea do not form spores, which many bacteria are capable of
"They are believed to be the ancestors of plants" - ?? Not sure. If I had to guess, I would go with NO, since the general consensus is that plants developed from green algae. Check your class notes.
"They have a cell membrane made of unusual lipids" - NO, only Archaea have that (they possess unusual ether lipids as part of their cell membranes, which bacteria do not)
Hope this helps!
Good luck.