The answer is catastrophism.
Catastrophism is a theory explaining that the Earth has been affected by sudden catastrophes which created its geological features. Some of the proposed catastrophes is a global flood followed by an uplifting of some rock which happened sudden, in a short period of time. It is opposite theory to uniformitarianism which explains that the Earth was formed in slow changes.
Invasion and multiplication of the bacteria in body tissues result in local cellular injury due to
1 competitive metabolism
2. Toxin- which is a poisonous substance produced within living cells or organism
3. intra cellular replication
4. antigen-antibody interaction- which is a specific chemical interaction between antibodies produced by B cell of white blood cells and antigens during immune reaction
Purines have 2 rings pyrimidines have 1 ring.
