Final answer:
Palestrina's Gloria from the Pope Marcellus Mass is characterized by complex polyphony, a style prevalent in Renaissance sacred music, and does not exhibit monophonic or homophonic textures, nor is it in strophic form.
Step-by-step explanation:
Giovanni Pierluigi da Palestrina's Gloria from the Pope Marcellus Mass is an example of Renaissance sacred music that is characterized by complex polyphony. This style was predominant in the liturgical music of the period. The Gloria is a section of the Catholic Mass that was set to music by many composers, and Palestrina's version stands out for its clarity and smooth polyphonic style, which seeks to make the text intelligible amidst the rich interweaving of musical lines. This piece does not fit the descriptions of being monophonic, as there are multiple independent vocal lines, nor is it primarily homophonic, where one would expect all voices to move together rhythmically. Lastly, the Gloria is not strophic in form, which would mean that the same music is repeated for each verse of text; instead, Palestrina's Gloria flows through composed sections that correspond to the different parts of the text.