All chordates. a notochord is present at some point in all chordates but sometimes is lost or becomes another structure, like vertebrae
Also idk what “Tregon” so hopefully that didn’t stray from my answer being right
Thomas could maybe look back through his day and see where he put them
The gravitational force between two rolling balls depends on their masses and which other factor?
Answer: C) Their separation "100% sure
Good luck and Have a nice Benevolent Day! :)
