Oddities: Cleopatra's slaves often died because she tested this on them?

Questions

A female mouse may spawn as many as ten litters of eight to ten young during her lifetime - which is generally less than a year. The gestation period is three weeks, and the young mice reach maturity in only ----------?

A fox litter is typically 10 to 15 ----------?

A full-grown ---------- may be 8 feet high at the shoulder and weigh almost a ton.?

A garter snake can give birth to ----------?

A giant Pacific ---------- can fit its entire body through an opening no bigger than the size of its beak.?