Biological transmission differs from mechanical transmission in that biological transmission

Biological transmission involves the reproduction  or propagation of  agent or pathogens within  the arthropods vectors  before transmission begins.while mechanical transmission involves just  transfer of pathogens/agents   from  an infected host,to another suspectable host directly(direct mechanical transmission) or when anthropoids transmits pathogens  obtained from  from a contaminated source.(indirect mechanical transmission).

The two mechanisms represented mode of transmission of diseases.

it takes hundreds of years to become stable.

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lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.