Your immune system protects you from bacteria and viruses. Sometimes it misreads a harmless substance as a threat. When that happens, your body creates chemicals, like histamine, that trigger an allergic reaction. It's unclear what causes your immune system to make the mistake about certain things.
Answer:
Structure Z is the cell wall and is very strong. It keeps out pathogens because of its thick layer
Explanation:
Explain how the interaction between mRNA codons and tRNA anticodons codes for a specific amino acid<span>
Answer: mRNA codons holds the info for specific amino acids. Anticodons are tRNA sequences complementary to the mRNA codons that bring the specific amino acids for the protein.</span>
The answer of the absolute refractory period is 3.5
