Rickettsiae is transmitted via fleas, ticks and lice.

Endospore formation is a characteristic of which:

This spore forming bacilli produces food poisoning:

These bacteria is curved or corkscrew shaped:

The type of bacteria that is cocci in form:

The spread of microbes from host to host by food, milk and water is what mode of transmission:

Parrott fever is transmitted via:

What is the Central Limit Theorem and why is it important?

Sandpaper comes in different degrees of roughness.  The most abrasive type has large pieces of sand.  

You may get laughs when you deride someone’s appearance, but some of us find your scornful remarks more in bad taste than amusing.