The stages of embryonic development in the correct order is below
<span>zygote, blastocyst, gastrula
Hope this helps!</span>
An Open Boat by Alfred Noyes See - quick - by that flash, where the bitter foam tosses,
The cloud of white faces, in the black open boat,
The literary device used in these lines is personification to give the foam a human quality.
Through the characterization of sea as humanistic, animalistic and deistic, Crane profoundly believes that the sea is indifferent to human’s plight. Narrator describes the development of sea as earlier it “snarls, hisses, and bucks like a bronco” and later it purely “paces to and fro,”. This depicts that the sea can be both hurtful and helpful, sea doesn’t change its motivation in the light of men’s struggle nor it can be understood.
Oh boy.
If this is story is planned to end with crazy plot twist i suggest you try to figure that out.
I'm thinking that the girl maybe early adult is living in an apartment with her (insert mental illness) twin and is put into several life threatening scenarios such as car crashes, drugged drinks etc. She doesn't know what is going on but she eventually, though means of spying or accidental, she learns that it's her twin. Maybe some twilight zone hitchhiker he keeps appearing anywhere sort of ordeal. I don't really know what genre you're going for but I think a very realistic interpretation and non-paranormal would be pretty awesome.
I don't have many ideas right now on murder motives besides some sort of schizophrenia or brainwash/temptation. But the story sounds great.
Best of luck!