Answer:
If your just looking for a description here you go.
Explanation:
Most spiral galaxies contain a central bulge surrounded by a flat, rotating disk of stars. The bulge in the center is made up of older, dimmer stars, and is thought to contain a supermassive black hole. Approximately two-thirds of spiral galaxies also contain a bar structure through their center, as does the Milky Way.
Hope this helps.
Answer:
Organism- A living thing.
Population- The amount of Organisms in a certain species.
Biological community- The species and others in a certain biome
Ecosystem- The entire biome itself
Biome- A type of landform with its own features and geography.
Curing heart disease by regenerating damaged heart tissue.
I believe vestigial structures are evidence of evolution because organisms inherit anatomy from their ancestors.
Hope that helps.
