Evolutionary Relationships
Biology ⇒ Evolution and Diversity
Evolutionary Relationships starts at 9 and continues till grade 12.
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A researcher finds that two species share a unique genetic marker not found in any other species. What does this suggest about their evolutionary relationship?
A scientist compares the amino acid sequences of a protein in two species and finds only two differences. What does this suggest about their evolutionary relationship?
Describe how fossil evidence can be used to determine evolutionary relationships.
Describe the difference between a monophyletic, paraphyletic, and polyphyletic group.
A researcher finds that two species share a unique genetic marker not found in any other species. What does this suggest about their evolutionary relationship?
A scientist compares the amino acid sequences of a protein in two species and finds only two differences. What does this suggest about their evolutionary relationship?
A phylogenetic analysis of four species (A, B, C, D) based on DNA sequences shows that A and B share 98% sequence similarity, B and C share 95%, and C and D share 99%. Based on this data, which two species are most closely related?
A researcher is constructing a phylogenetic tree using both morphological and molecular data. Explain one potential source of conflict between these two types of data and how it might be resolved.
Which molecular evidence is most commonly used to determine evolutionary relationships among organisms? (1) Protein structure (2) DNA sequence comparison (3) Cell size (4) Number of offspring
Which of the following best defines a monophyletic group? (1) A group with a single common ancestor and all its descendants (2) A group with multiple ancestors (3) A group with no common ancestor (4) A group based on similar appearance only
Which of the following best describes a phylogenetic tree? (1) A diagram showing evolutionary relationships among species (2) A chart of population growth (3) A food web (4) A map of animal migration
Which of the following is a derived character shared by all mammals? (1) Feathers (2) Mammary glands (3) Gills (4) Scales
Fill in the blank: The branching point on a phylogenetic tree represents a __________ event.
Fill in the blank: The evolutionary history of a species or group of related species is called its __________.
Fill in the blank: The evolutionary process that results in the formation of new species is called __________.
Fill in the blank: The method of grouping organisms based on common ancestry is called __________.
Homologous structures in different species indicate a common ancestry. True or False?
The more similar the DNA sequences between two species, the more closely related they are. Yes or No?
True or False: All members of a clade share at least one derived characteristic.
True or False: All species within a genus are more closely related to each other than to species in other genera.
