What do pigs and hippos have in common

Sweating and breathing is an example of differentiation specialization maintaining homeostasis metabolism

Lola needs to sign 6 invitations. using stopwatch that measures time to tenths of a second, it takes lola 5.3 seconds to sign her full name. going by the accuracy of the stopwatch, which is the most accurate determination for the number of minutes lola needs to sign all 96 invitations

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?