객관식
Which of the following statements is supported by DNA studies of Darwin's finches?
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1. Introduction to Biology
Natural Selection and Evolution
객관식
Which term describes the common ancestor that gave rise to the most evolutionarily recent derived characters in a phylogenetic tree?
A
Most recent common ancestor (MRCA)
B
Outgroup
C
Basal ancestor
D
Sister taxon
검증된 단계별 안내1
Understand the concept of a phylogenetic tree: A phylogenetic tree is a diagram that represents evolutionary relationships among organisms. It shows how species or groups are related through common ancestors.
Define the term 'Most Recent Common Ancestor (MRCA)': The MRCA is the most recent individual from which all organisms in a group are directly descended. It is the point in the phylogenetic tree where the branches leading to the derived characters converge.
Clarify the role of an outgroup: An outgroup is a species or group that is closely related to the studied group but not part of it. It helps to root the phylogenetic tree and provides a reference point for determining ancestral and derived traits.
Explain the term 'Basal ancestor': A basal ancestor refers to the earliest common ancestor in a phylogenetic tree, typically located at the base of the tree. It is not specific to the most recent derived characters.
Discuss the term 'Sister taxon': Sister taxa are two groups or species that share an immediate common ancestor. They are each other's closest relatives but do not necessarily represent the MRCA of the entire group.
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