Question

3.

Which of these are least helpful for constructing phylogenetic trees?
A analogous structures
B. homologous structures
வாலாய
C. embryonic structures.
D. vestigial structures
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Answer 1

I would choose D. vestigial structures

Step-by-step explanation:

Because when you talk about phylogeny trees you are talking about relationships or differences between organisms that under go change. The organ systems however, in most species do not vary by much. I don't know if I am right, but that would be my guess.