Which of the following starts with __ (double underscore) in PHP?

If the following piece of JavaScript code is executed, will it work if not, what kind of possible error can occur? function fun(o)   {   for(;o.next; oo =o.next);   return o;   }  

Write necessary HTML and JavaScript code to display a simple message “Welcome!!!” on your demo webpage and when the user hovers over the message, a popup should be displayed with a message “Welcome to Web Programming Class!!!”. 

Neutrophils can kill bacteria by all of these methods EXCEPT:

Where can virulence factors be found at?

The normal microbiota compete with pathogens in a variety of ways to protect the body, creating a situation known as microbial antagonism.

All of the following are leukocytes except:

This bacteria is an example of an ectosymbiont:

Vaccines: (select all that apply)

Elimination is the first step in phagocytosis.