Many rickettsia are PATHOGENS.
Pathogens are micro organism that cause diseases and rickettsia are majorly disease causing organisms. They are rod shaped bacteria and most species are gram negative. They are natural parasite of some arthropods and they cause diseases in both humans and animals.
The structures a virus can contain are
-nucleic acid
-envelope
-capsid
75% (3/4)
there would be BB, Bb, Bb and bb
BB and Bb are the only ones that is dominant since bb is recessive.
The answer is A as during anaerobic respiration, as there is no oxygen, glucose is converted into ethanol and lactic acid to produce some energy.
Genes are the segments of DNA transferred from parents to offspring