“is the lifespan of snowshoe hares, which are white in the winter and brown in the summer, affected by levels of winter snowfall? ” is this a good scientific question?

yes! i think it might sound a bit better if you worded it like this though; “...affected by the levels of snowfall in the winter time” hope this helps you out!

feral cats are estimated to eat tens of millions of native animals each night in australia

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]