Phylogenetic Trees
Biology ⇒ Evolution and Diversity
Phylogenetic Trees starts at 10 and continues till grade 12.
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See sample questions for grade 10
A phylogenetic tree shows that species X and Y share a more recent common ancestor with each other than with species Z. What does this indicate about their evolutionary relationship?
A scientist is comparing DNA sequences of four species to construct a phylogenetic tree. Species A and B have the most similar sequences, while C and D are more different. Which two species are likely to be most closely related?
Describe how an outgroup is chosen for a phylogenetic analysis.
Describe the difference between homologous and analogous traits in the context of phylogenetic trees.
Describe what a branch point (node) on a phylogenetic tree represents.
Explain the difference between a rooted and an unrooted phylogenetic tree.
Explain why molecular data is often preferred over morphological data in constructing phylogenetic trees.
Explain why phylogenetic trees are considered hypotheses.
What is a phylogenetic tree?
What is the main purpose of constructing a phylogenetic tree?
What type of data is most commonly used in modern phylogenetic analysis?
A researcher is constructing a phylogenetic tree using both mitochondrial DNA and nuclear DNA sequences from five different species. Explain why using multiple types of genetic data can improve the accuracy of the resulting phylogenetic tree.
A student claims that the order of the branches on a phylogenetic tree always represents the chronological order in which species evolved. Is this statement true or false? Explain your answer.
Describe how the principle of parsimony is applied when constructing a phylogenetic tree.
Explain the significance of a polytomy in a phylogenetic tree and what it suggests about the evolutionary relationships among the taxa involved.
In a phylogenetic tree, what does it mean if two species are connected by a very short branch length compared to other species pairs?
