Astronomers have seen stars forming within a nebular cloud. As the nebular cloud condenses and its own gravitational attraction collapses it, heat and energy build up creating a planet.
You're either talking about Community which means grouping of different organs or population which is the grouping of the same organ
Simple organic molecules can be organized into much longer, more complex molecules.
The corect answer is: B. Intercalated disks.
I hope that helped! :)
