Answer:
nose,mouth,and eyes are 3 ways pathogens can enter the body
A single human B cell can produce only D. 1 antibody.
It produces a single species of antibody, with unique antigen-binding site.
Answer:
permineralization replacing original cellulose of the wood.
Explanation:
Gene expression involves formation of various proteins from specific genes. The expression starts with the process of transcription where DNA is transcribed into a mRNA by enzyme RNA polymerase. Then mRNA diffuses out of the nucleus and the process of translation takes place in the ribosomes generating a polypeptide then a protein is formed. Therefore, the correct answer is transferring of information from DNA to messenger RNA (transcription).