Like Max Scheler, Gehlen (1904-76) thinks the key question of philosophical anth

Like Max Scheler, Gehlen (1904-76) thinks the key question of philosophical anthropology – what are the essential features of the human person and of human life? – can provide a unifying impulse to the diverse researches developed in the sciences. Gehlen seeks the basic categories that organize human existence and social life, the irreducible features that distinguish humanity from the rest of animal life. His central answer to the question is that humans are biologically ill-adapted creatures who are born helpless and thus depend on culture to solve problems of survival and adaptation to environmental changes.
1) According to the excerpt from Gehlen’s text on Man, His Nature and Place in the World, what is the “basic defining characteristic of man” and why?
2) What does Gehlen mean when he writes that “In terms of morphology, man is, in contrast to all other higher mammals, primarily characterized by deficiencies”?