Question

what is the transmissive barrier through which two cell layers interact in the structure of the coral body?
reefs
mesoglea
cnidarian
polyps
question 8
1 pts
which of these creates a nonbiological impact on coral reefs?
fungi
bacteria
humans
viruses

Explanation:

• First question: Corals are cnidarians. Their body structure has two cell layers (epidermis and gastrodermis) with mesoglea (a jelly - like substance) in between which acts as a transmissive barrier. Reefs are large structures made by corals. Cnidarian is the phylum name. Polyps are the individual coral organisms.
• Second question: Fungi, bacteria, and viruses are biological entities. Humans, on the other hand, are not part of the biological factors (in the context of being a non - biological impact as per the question's categorization) that directly interact with coral reefs in the same sense as the other biological agents. Human activities like pollution (non - biological in the sense of not being a living organism that colonizes or has a biological interaction like symbiosis or predation in the strict biological sense here) can impact coral reefs.

Answer:

• First question: mesoglea
• Second question: humans