Xen- (prefix): Foreign or other. As in: 1  Xenoantigen -- An antigen that is found in more than one species.  Xenograft -- A surgical graft of tissue from one species to an unlike species, genus or family.
Diet. Snow Geese feed almost exclusively on plant material. During the breeding season, they eat many seeds, leaves, and roots of aquatic vegetation. The very young birds feed on invertebrates. Berries become more important in the fall. In winter, waste grain from agricultural fields has become a primary food source.
Bears will eat honey if they can, but grizzly and black bears eat mostly vegetation, insects, berries, and meat-especially salmon, scavenged winter killed animals and young moose, caribou and deer. Have you ever wondered what bears do when they hibernate, how wood frogs freeze solid or how far caribou migrate?