Genes are made of DNA and are inherited from parent to offspring. Soma DNA sequences code form RNA which, in turn, codes for the amino acid sequence of proteins. Cytochrome C is a protein involved in using energy in the cell. Cytochrome C is found in most, if not all, known eukaryotes. Over time, random mutations in the DNA sequence occur. As a result, the amino acid sequence of Cytochrome C also changes. Cells without usable Cytochrome C are unlikely to survive.
Cytochrome C is associated with the inter membrane of the mitochondrion. It is a small protein from eucaryote cell.  
Procedure and conclusions: 
We compare the protein "Cytochrome C": 
Mamales: horse, whale and donkey
Birds: chicken and penguin 
Reptils: snake
Insect: moth
Fungi: yeast
Plant: wheat
| 
Horse
        | 
Donkey
   | 
Whale
   | 
Chiken
   | 
Penguin
   | 
Snake
   | 
Moth
   | 
Yeast
   | 
Wheat
   | |
| 
Horse
    | 
0 | ||||||||
| 
Donkey | 
0 | 
0 | |||||||
| 
Whale | 
5 | 
4 | 
0 | ||||||
| 
Chiken | 
11 | 
10 | 
9 | 
0 | |||||
| 
Penguin | 
13 | 
12 | 
10 | 
3 | 
0 | ||||
| 
Snake | 
21 | 
29 | 
18 | 
18 | 
19 | 
0 | |||
| 
Moth
   | 
24 | 
23 | 
22 | 
23 | 
23 | 
26 | 
0 | ||
| 
Yeast
   | 
40 | 
39 | 
39 | 
40 | 
39 | 
40 | 
46 | 
0 | |
| 
Wheat
   | 
38 | 
37 | 
36 | 
39 | 
39 | 
37 | 
40 | 
43 | 
0 | 
(from laura's blog)
|  | 
| (from myriam's blog) | 
 
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