Malus sieversii modern apple cultivars. Unlike domesticated varieties its leaves go red in autumn: 62.2% of the trees in the wild do this compared to only 2.8% of the regular apple plant or the 2,170 English cultivated varieties. The species is now considered vulnerable to extinction. "Malus sieversii" has previously been identified as the main contributor to the genome of the cultivated apple ("Malus pumila"), on the basis of morphological, molecular, and historical evidence. A DNA analysis in 2010 confirmed "M. sieversii" as the progenitor of the cultivated apple. A third species that has been thought to have made contributions to the
Karl Malus U.S. Agent then destroyed Malus' equipment and records. Malus has since worked for a variety of criminal organizations, including the Corporation, and the Maggia. He even worked with the Avengers and the Thunderbolts in their efforts to defeat Count Nefaria in exchange for a reduced sentence. During the "Dark Reign" storyline, Karl Malus was researched by Quasimodo as part of its work for Norman Osborn. Karl Malus was recruited by the Wizard to become a new member of the Frightful Four, only to find himself being forcibly made the new host of the Carnage Symbiote. He was eaten by Carnage