Seeing as Peter is male, he's seeing a counselor (which indicates mental/emotional/psychological issues) and has been referred to a urologist, I'd say his problem is erectile dysfunction, or choice #2.
its nitrogen i took the testttttttttttttttttttttttttttttttttt
Answer:
Isotonic
Explanation:
A solution is isotonic to a cell if it has the same Concentration of dissolved particles as the cell. Water molecules move in and out of the cell at equal rate, so the cell size remains the same.
The bronchi are where air passes from the trachea.
Answer:proline, cysteine, Proline
Explanation:Proline causes kinks in the amino acid. Disulfide bonds in proteins are formed between the thiol groups of cysteine residues through the process of oxidative folding. Cys is considered to be hydrophobic, while proline is considered to be polar