Which one of the following phylogenetic trees illustrates the relationship between Archaea, Bacteria and Eukarya?
The question involves selecting the correct phylogenetic tree that illustrates the accepted evolutionary relationship between Archaea, Bacteria, and Eukarya. Let's break down these relationships:
Key Concepts:
- Domains of Life: The three domains of life include Archaea, Bacteria, and Eukarya. This classification system is based on differences in the sequences of ribosomal RNA (rRNA) genes.
- Phylogenetic Relationships: In terms of evolutionary relationships, Archaea and Eukarya are more closely related to each other than either is to Bacteria. This is supported by molecular studies, especially those analyzing ribosomal RNA sequences.
Analyzing the Options:
- Option P: This tree suggests that Archaea and Eukarya are closely related, but it places Bacteria as the closest to Eukarya, which is incorrect.
- Option Q: This tree shows Bacteria branching off first, with Archaea and Eukarya being more closely related to each other—which is the correct representation of their evolutionary relationship.
- Option R: It shows Bacteria and Eukarya closer to each other, with Archaea branching last, which is incorrect.
- Option S: In this option, Bacteria and Archaea appear to be more closely related, which is incorrect.
Conclusion:
Among the given options, Option Q correctly represents the evolutionary relationship between Archaea, Bacteria, and Eukarya, with Bacteria branching off first.
Therefore, the correct answer is Option Q.
Important Questions from Phylogenetic trees
The phylogeny of six species of birds is illustrated below, where the horizontal branch lengths correspond to genetic distance. These six species are distributed in three islands X, Y, and Z. Island X harbours species 1, 4, 6; Island Y harbours species 1, 2, 4; and Island Z harbours species 3, 4, 5. Which one of the following is true about the phylogenetic diversity of these islands?
The phylogeny below shows the relationship between six species based on whole genome data. The sequence of a part of a particular gene from each species is provided at the tips of the tree. Based on the principle of parsimony, which one of the following is the expected sequence for the ancestor X?
A phylogenetic tree for the evolution of two pigmentation traits in species of fish is shown for clades X, Y and Z. Genes A and/or B, if mutated, can cause dark pigmentation in the body.
Which one or more of the following statements is/are correct?- Which of the following trees is phylogenetically MOST accurate?
- Whales and dolphins are hypothesized to have evolved along the northern shore of the Tethys Sea, prior to the Indian plate's collision with the Eurasian plate. To which one of the following animals are these aquatic mammals most closely related?
