Misc: what new title was macbeth greeted with after returning from a victorious war?

Questions

A plaice, a large European flounder, can lie on a checkerboard and reproduce on its upper surface the same pattern of squares, for ----------?

A pregnant goldfish is called a ----------?

A ---------- can swallow a rabbit whole and may eat as many as 150 mice in a 6-month period.?

A quarter horse gets its name from its speed in running the ----------?

A racehorse averages a weight loss of between 15 and 25 pounds during a ----------?