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Which two organisms are most closely related? A
Which two organisms are most closely related?
A. Euryarchaeotes and diplomonads
B. Brown algae and dinoflagellates
C. Brown algae and red algae
D. Euglena and brown algae
Expert Solution
Answer:
(B). Brown algae and dinoflagellates.
Explanation:
In a phylogenetic tree, two species are considered as most closely related if they share a more common ancestor than the others. The nodes of tree represent the common ancestor, while the tips of branches represent species originated from that ancestor.
As in given tree, dinoflagellates and brown algae share a common ancestor as they evolved from the same ancestor, they are most closely related to each other.
Thus, the correct answer is option (B).
PFA
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