Answer:
fibroblasts, macrophages, and mast cells.
Explanation:
 
        
                    
             
        
        
        
Gastric juice would digest the stomach lining, resulting in ulcers.
        
                    
             
        
        
        
Answer:
C- homogeneous mixture
Explanation:
its made up of multiple elements that aren't chemically combined. 
you cannot see the parts of the mixture
 
        
             
        
        
        
All forms of RNA are intermediate molecules that are fabricated within DNA to perform cellular functions.
mRNA - messenger RNA carries selected portions of DNA used to fabricate polypeptides used to fabricate amino acids for protein.
tRNA - transfer RNA is comprised of select genetic code and transfers amino acids to ribosomes for assembly
rRNA - ribosomal RNA is comprised of select genetic code and makes the ribosomes
RNA is highly mutatable, highly reactive, non-reproductive, and highly specialized metabolically, and consequently totally unsuitable for consideration of any pre-DNA senario being posited for the origin of life.