Multiple Choice
In a taxonomic diagram, if the organism at location D is the most recent common ancestor to the organisms at locations A, B, and C, what is the relationship of organism D to A, B, and C?
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1. Introduction to Biology
Introduction to Taxonomy
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In a cladogram, the diagonal arrow typically indicates that we are moving _________ in time.
A
sideways
B
forward
C
backward
D
in a circular pattern
Verified step by step guidance1
Understand the concept of a cladogram: A cladogram is a diagram used in biology to represent evolutionary relationships among organisms. It shows how species or groups are related based on shared characteristics and common ancestry.
Recognize the significance of the diagonal arrow: In a cladogram, the diagonal arrow typically represents the progression of time or evolutionary changes. It helps to visualize how species evolve and diverge over time.
Interpret the direction of the arrow: Moving forward in time on a cladogram means progressing from ancestral species to more derived or modern species. The arrow indicates the chronological sequence of evolutionary events.
Eliminate incorrect options: 'Sideways' and 'in a circular pattern' do not accurately describe the movement of time in a cladogram. 'Backward' would imply moving toward ancestral species, which is not the typical direction indicated by the arrow.
Conclude that the correct interpretation of the diagonal arrow in a cladogram is 'forward,' as it represents the progression of evolutionary time and relationships.
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