How is stellar classification useful to people?

Stars are classified according to temperature, with type O stars being the hottest, then B, A, F, G, K, M. The Sun is a type G star.

Glaciers are useful to people because some of the best preserved fossils are found within them. More importantly, though, glaciers are of great importance to many people because they reflect large...

they help biologist group and organize organisms

I think they are useful because they help us make the models and tells us how the model is going to look like. They are very important for us because they help us learn and let us make the models...

The more similar (or homologous) some chemical structures are, the more likely they are closely related. Conversely, greatly dissimilar structures indicate divergence a long time ago.If the only...