Hemiptera plant. Phloem sap, which has a higher concentration of sugars and nitrogen, is under positive pressure unlike the more dilute xylem sap. Most of the Sternorrhyncha and a number of Auchenorrhynchan groups feed on phloem. Phloem feeding is common in the Fulgoromorpha, most Cicadellidae and in the Heteroptera. The Typhlocybine Cicadellids specialize in feeding on non-vascular mesophyll tissue of leaves, which is more nutritious than the leaf epidermis. Most Heteroptera also feed on mesophyll tissue where they are more likely to encounter defensive secondary plant metabolites which often leads to the evolution of host specificity. Obligate xylem feeding is a
Sap (producer) "Watching Movies", and The Game's "Celebration". Most recently Sap Produced, "Powers That Be" featuring Rick Ross and Nas. The song is featured on Ross's Album "Rather You Than Me". As a rapper he is the leader of the group The Pioneer Crew. Sap was born in Chester, Pennsylvania, but moved to Newark, Delaware at a very young age. Sap first begun making hip hop instrumentals on FL Studio at the age of 15, putting his beats on MySpace. He went to Christiana High School in Newark. Around 2007 to 2008, he began producing for local rappers such as Joey Jihad