You need to give us the text, how would we know what to answer if we don’t know what text were reading. All I can help you with so far is to reread the text and see what the author says
Answer:
in two layers
Explanation:
their called the lipid bilayer
I'm pretty sure the answer is Trace fossils
Hope this helped
The role of inhalant allergens in allergic airways disease. Immunoglobulin (Ig) E-mediated sensitization to domestic inhalant allergens (eg, dust mite, cockroach, cat, and dog) is the most important risk factor for asthma.