What theory explains how the universe was flattened

When water freezes, it . contracts expands

If two parents who's blood types are both b produce a child that has blood type o, what can you say about the parent's genotybes? oa) one is ii ob) one is ibi oc) both are bi od) nothing, this is impossible

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?