The structures a virus can contain are
-nucleic acid
-envelope
-capsid
Hydrochloric Acid (HCl) is produced by the stomach and has the job of breaking down proteins. If you make plenty of HCl, then the body can adequately digest protein. If not, protein digestion is compromised.
Answer:
1. the study of human behaviour.
2. using a secret or exclusive language in certain circumstances
3. Multilingual
Crop rotation methods in the use of legumes.