Avatar or Expansion of Krishna: Transcendental Nature of Avatars

                                                                  Q. Why is Ananta Sesa "a many hooded serpent?" Serpents are from the lower planetary system, and are synonymous with "evil". What explanation can be given for this?

                                                                  Q. We know that Krishna will incarnate as Kalki at the end of Kaliyuga but in the text below it doesn't mention anything about it. Isn't Kalki avatar considered as Krishna or Supreme himself? In the purport Srila Prabhupada explains about Chaitanya Mahaprabhu in Kaliyuga but there is no explanation on Kalki avatar, even as assertion of Krishna? Can you please explain the Kalki avatar mystery in Kaliyuga?

                                                                  *In SB 7.9.38*
                                                                  ittham nr-tiryag-rsi-deva-jhasavatarair
                                                                   lokan vibhavayasi hamsi jagat pratipan
                                                                  dharmam maha-purusa pasi yuganuvrttam
                                                                   channah kalau yad abhavas tri-yugo ’tha sa tvam

                                                                  Q.  While preaching/discussing with a devotee, the following question came up. Does Lord Ganesha belong to the category Jiva Tattva? Also does Goddess Saraswati belong to the category of Shakti tattva? Are they eternal? One consequent question is - we know Lord Brahma belongs to the category of Jiva Tattva and if Goddess Saraswati is eternal, how is it that she will serve a different person as husband for every creation?  Understanding this will help in preaching to Indians, so I am asking this. Please forgive me if I could not address these exalted personalities properly.