What is the cell membrane gateway system is specifically called the

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

In which of the following relationships is one organism always benefited while the other organism is always harmed

What is responsible for the uneven heating between the poles and the equator on any given day