Worth 20 our planet has frozen poles. what property does frozen water have that might be useful in searching for other planets with frozen poles?

Ice and snow are reflective, so a planet that has ice and snow will be more visible

Rivers and oceans may have been prominent features in its early history billions of years ago Mars was a warm and wet world that could have supported microbial life in some regions but the planet is smaller than earth with less gravity anything or atmosphere overtime as liquid water evaporated more of it escaped into space along less to fall back to the surface of the planet

Once an egg is fertilized by a sperm, a zygote is formed. The zygote divides into multiple cells in a process known as cleavage, triggering the beginning of embryonic differentiation. ... Cells in these three layers will give rise to different parts of the organism. The endoderm eventually becomes the gut.Mar 3, 2011