Answer:
The difference is that the ones with dots have more cells in them and the other one must've been left there for awhile
Explanation:
Because i looked up what those dots meant
"Prophase I" is the stage of meiosis that synapsis and the formation of tetrads occur.
The answer is Echinoderms.
According to the Embryological studies, the most ancient chordates were closely related to the ancestors of the echinoderms. Echinoderms are members of the group Phylum Echinodermata of marine animals. Some known echinoderms are starfish, and sea cucumbers.