The Big Bang Or Big Bang Theory is the theory scientists say how our universe started scientists say this occurred 13.7billion years ago
They're opposites. On a wave the highest point is the crest, while the lowest is the trough
I believe either B or D because the days or years would not increase
The electrons are closer to the nucleus, its difficult to take them apart.
Group of animals whose ancestors were to the earliest chordates are Echinoderms.
The only difference is that they have a circular aperture mouth.
The only difference is that they lack backbones.
