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Crank
3 years ago
10

How can humans have a positive impact on air quality?

Biology
2 answers:
Vadim26 [7]3 years ago
8 0
Public transportation
const2013 [10]3 years ago
7 0
By using public transportation
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Can you tell from this tree whether a C at position 15 evolved before or after a T at position 15? Explain your answer
Ratling [72]

The evolutionary tree is not observed here but it is possible to answer this question by observing which nucleotide is found in the root of the node. It indicates the first substitution.

<h3>What is an evolutionary tree?</h3>

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brainly.com/question/2189834

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