Why does the Torah mention that a Neveilah renders Tamei whoever touches it both here and later in Pasuk 39?
Rashi (on Pasuk 26): The Pasuk is referring to the Neveilah of a Tamei species of animal, whereas the Pasuk later is referring to that of a Tahor species. 1
See Sifsei Chachamim
The current Pasuk is discussing the Neveilah of a Tamei species whereas whereas Pasuk 39 is discussing a Tahor species (See Rashi in Pasuk 26). Why were they taught separately?
Ramban, Rashbam (on Pasuk 26) and Moshav Zekenim: Because, whereas our Pasuk does not mention Misah, because even if it is Shechted, it is subject to Tum'as Neveilos when it dies, Pasuk 39 mentions Misah to indicate that if it is Shechted, it is not a Neveilah.
What is "u'le'Eileh Titama'u" referring to?
Rashi: It is referring to the species that are about to be mentioned (. 1
Ibn Ezra: It is referring to all the species-mentioned above. 2 .
Sifra: With reference to "le'Chol ha'Beheimah" in Pasuk 26). Moshav Zekenim: However, fish, birds and locusts mentioned above are not subject to Tum'as Neveilos.
In other words also fish, birds and locusts are subject to Tum'as Neveilos. The Ramban maintains that the Ibn Ezra erred. (even based on his personal style, to ignore Midr'shei Chazal and explain the Pasuk according to the simple meaning, since above the Torah mentioned Tum'ah only regarding animals, and Sheketz regarding fish, birds and Sheretz ha'Of, an indication that only animals are subject toTum'ah! - PF)
What are the ramifications of the fact that one becomes Tamei?
Rashi (on Pasuk 29): A Tamei person is forbidden to eat Terumah and Kodshim, and to enter the Beis-ha'Mikdash.
On what condition does the Tum'ah go away in the evening?
Why does the Torah write "Kol ha'Noge'a be'Nivlasam" and not "Kol ha'Noge'a b'Nivlasam"?
Chulin 126b: To preclude a closed thigh-bone (containing marrow) from Tum'as Neveilos. 1
Chulin (Ibid.): But not if it has a hole via which it is possible to touch the marrow inside. See Torah Temimah, note 72.
How will we reconcile the current Pasuk, which permits becoming Tamei through a Neveilah, with Pasuk 8, which states "Lo Siga'u"?
Refer to 11:8:3:1-3.