Which of the following is not one of chargoff's rules?
a. the amount of a, t, g, and c in dna varies from species to species, but not within species
b. in each species, the amount of a = t and the amount of g = c
c. in every species, the amount of purines (a+g) equals the amount of pyrimidines (t+c)
d. in every species, dna is a simple repeating polymer made up of the same four nucleotides.

The answer is:

d. In every species, DNA is a simple repeating polymer made up of the same four nucleotides.

Explanation:

Chargaff’s rules are based in the quantitative relationship of the nucleotides (adenine, guanine, cytosine and thymine) that form part of the double strand of DNA.

One of the rules states that the amount of adenine (A) is the same as thymine (T), and that the amount of guanine (G) is the same as cytosine (C). A=T, G=C

Being said in another way: the total amount of purine bases it’s the same as the total amount of pyrimidine bases. (A + G= C + T).

The second rule states that the composition of DNA (the amount of nucleotides) is different from one species to other, but nor within species.

did u get the answer? /? ? / me

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.