user4216: With a unique id for a question one can call attention to the previous questions with ease and also hyper text it. 

user107: They are. For example, your meta question right here is #494: meta.biology.stackexchange.com/questions/494
Here's biology.SE #1: biology.stackexchange.com/questions/1

4216: <p>With a unique id for a question one can call attention to the previous questions with ease and also hyper text it. </p>
 107: <p>They are. For example, your meta question right here is #494: <code>meta.biology.stackexchange.com/questions/494</code></p>

<p>Here's biology.SE #1: <code>biology.stackexchange.com/questions/1</code></p>
