The sea level would rise dramatically and flood coastal areas, putting them underwater. A lot of Arctic animals would die - penguins, polar bears, seals, etc. would drown. The water's temperature would change, causing coral reefs all over the world to bleach out and die. Most marine life would suffer from the loss of their environments, and larger animals on the food chain would wipe out from the dwindling numbers of their prey.
They could all disappear if the temperature of the earth rises enough.
No. Uranus does not have a solid surface for the caps to be on. Earth and Mars have polar ice caps.
They'd flood.
Mars also has two polar ice caps.
Pluto although entirely covered by ice, is no longer considered a planet. The only planets in our solar system with polar ice caps are Earth and Mars.
Mars and earth
The sun
Polar ice caps
Earth and Mars are the only planets known to have polar ice caps. Yes, I agree. However there is a possibility that Mercury has some ice in deep craters at the poles.
Earth and Mars are the only ones.
Rain on the polar ice caps? Probably not; snow would be more common.
No.