Phylum Chordata is the only phylum where all the members have a  backbone.   However, there is more to it than that, especially given that there  are two invertebrate châ¦ordate groups - Urochordata (tunicates) and  Cephalachordata (lancelets) - whose backbone is not in the form of  actual vertebrae.
The answer. Anger is a normal, healthy emotion that we all experience at times. Like any other emotion, anger exists on a continuum with varying degrees of severity. The range of emotions may include minor annoyance, irritation or frustration, all the way up to fury or rage.
Anger is used as a protective mechanism to cover up fear, hurt or sadness. Anger becomes the predominant feeling behaviorally, cognitively, and physiologically when a person makes the conscious choice to take action to immediately stop the threatening behavior of another outside force.