Question

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Answer 1

2 and 4

Step-by-step explanation:

You can see their patterns match except for the last letters of 2 and 4

Answer 2

Mammal 2 and 4 are most related, why?

Explanation: They have TCT, CAG, CTG and CA, the only ones it doesn't have is the last ones, A and G, making it the only difference. 1 has 2 differences to 2, 3 differences to 4, and 3 has 2 differences as well, therefore 2 and 4 have the least differences.