It would be the x-chromosome only, I believe.
Anemones and corals are restricted to shallow waters because they usually grow in the region of the euphotic zone where sunlight is easily available to perform photosynthesis.
<h3>What do you mean by Corals?</h3>
Corals may be defined as a structure composed of skeletons present in colonial marine invertebrates known as Coral reefs.
Corals and anemones require sunlight in order to survive. Hence, they live in the upper zone (euphotic zone) of the water bodies. If they allow growing in the benthic zone, they never survive due to the absence of sunlight.
Therefore, it is well described above.
To learn more about Corals, refer to the link:
brainly.com/question/1143432
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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
Parasitic relation made up of a parasite an a host, in this case the parasite benefits while the host does not but it differs, for instance in some cases both benefit
