They are all layers of the earth
3rd and 4th awnsers are correct
Centimeter = 1/100 of a Meter
Kilometer = 1000 Meters
86,000/100 = 860 Meters
860/1000 = 0.86 Kilometers
Write in your own words:
"Since the mouse is an endotherm, it probably has a higher metabolic rate, and thus a faster growth rate, than the lizard (an ectotherm of similar size) does. If the mouse has a faster growth rate, its bones would grow more between each ring, resulting in wider bone rings."
: )
and remember that a mouse is a endotherm because it generates metabolic heat to maintain internal body temperature.