Viruses need a host because a host is just like the owner of the virus "business". think of it as a company. the company has a boss- aka the person who made the company (this is the host) and the boss also tells the employees (bacteria etc) what to do and how to do it. without the host, the virus will die. :)
The shivering on a cold day is the body's mode of heat generation.This is a negative feedback mechanism where a change is detected by the body'd internal environment and crafts a mechanism to correct it
Answer:Acidity or alkalinity of a solution is measured by concentration of hydrogen ions (H+) versus hydroxyl ions (OH-) and is expressed as pH level, an exponential scale that ranges from 0 (very acidic) to 14 (very basic).
Explanation:
Its the center of the cell so the nucleus
I would say that the answer to this question is most likely B or D.
