D. radial symmetry evolved at least twice in unrelated invertebrates groups
If the respiratory membrane is composed of two layers of
stratified squamous epithelium, it will mostly contain numerous cell layers
because it is its composition of having to be a stratified squamous epithelium.
Another thing, the tissue will most likely be a shield for this type of
epithelium will serve as a protection against abrasion of which the respiratory
membrane will be protected of.
I'm pretty sure that it is polarity I hope I am right and good luck, but I am pretty sure it's polarity
The organelles and substances inside the organelles are smaller.
Answer:
The idea around genetic have changed.
