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
Osmosis is the diffusion of water across a membrane.
Answer: D.
Explanation: Members of the same species do not have the same number of cells. Think differences in height or weight. They do not have identical traits. Think siblings. They cannot create different species. Two wolves cannot make a coyote.