How to convert K^-1 to °C^-1 in thermal expansion

You don't need to convert.

The magnitude of a 1 degree change in Kelvin is the same as the magnitude of a 1 degree change on the Celsius scale.

Since thermal expansion depends on the change in temperature, this change will be the same on either scale.

a) no || b) the roots are above ground

Explanation:

well for the peculiarity and similarity, the roots are above ground when most  roots stay below. they aren't like normal roots. sorry for the late response, i hope this helps.