Agroup of organs that work together to perform a common function is called a(n)

In which layer do organisms on earth love?

Easy 6th grade work! 100 points! i need fast! compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city, describe the parts of a cell and their primary function.

Polar zones are cold and tend to be dry because of a pressure system of cold. low high