<span>​When two amino acids are chemically joined together, the resulting structure is called a dipeptide. A dipeptide is a ambiguous designation of two classes of organic compounds. Its molecules contain either two amino acids joined by a single peptide bond or one amino acid with two peptide bonds.</span>
Answer:
physical
Explanation:
example: water freezing into ice
there is no change in the chemical properties, frozen water is still water
The early shape of the fetal brain most resemble a tube. The fetal development starts after conception. After about four weeks the neural tube together with the back is closing. The fetal brain and the spinal cord will develop from the neural tube. Then the other organs and the heart are also starting to form.
