It's these two numbers, 20 and 13, that are used to make up the Tzolk'in calendar, the first calendar used by the Mayans. 1  1. 2  2. 3  3. 4  4. â¦. 5  5. 6.  NEXT.
Making the world better, one answer at a time. the nucleus is made up ofneutrons and protons. on the outside of the nucleus is the electrons. the nucleus is made up ofneutrons and protons. <br/>on the outside of the nucleus is the electrons.
A chromosome is made up of tightly-packed structures called DNA. Each DNA is made up of nucleotides. Each nucleotide is made up of a sugar, a phosphate, and a base (adenine, cytosine, guanine, and thymine).n the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure. yash Â· 4 months ago.