Hmmmm Since Adam didnt keel over and quit breathing, is it possible that 'death' as used refers not to death in and of its self, but the death of a human being,in a way the entire race of humans, having eternal consequences?
We know from using the 'Analogy of Faith', i.e., comparing Scripture with Scripture, that the "death" threatened as punishment for disobedience was three-fold; physical
(death of the body eventually over time), spiritual
(immediate loss of love for God and all that is good and a predisposition toward self and sin) and eternal
(the final but everlasting separation from God and the experience of the punishment pronounced).
We are not told if the animals we now know as being predators of other animals were carnivorous or not. It could be that they became
predatory after the Fall as part of the curse???
Plant life does not have "life" in the sense of animals or humans. The environmental extremists seem to think so, but Scripturally, this is not the case. Thus, the eating of vegetation cannot be used as an example of "death". (cf. Gen 7:21-23)