20 Questions
What is the term used to describe the study of evolutionary relationships between organisms?
Phylogeny
What is the significance of similarities in biochemical compounds found within cells?
They provide evidence for evolutionary relationships between organisms
What is the purpose of a molecular clock?
To measure the rate of simple mutations over time
What is an example of genetic similarity between humans and yeasts?
The presence of the same gene that codes for myosin in both organisms
What can be used to determine the evolutionary relationships between organisms that do not resemble each other anatomically?
Genetic similarities
What is phylogeny?
The evolutionary history of an organism
What do phylogenetic trees show?
The evolutionary relationships between organisms
According to the chart, which two animals are the most closely related?
Animal #1 and Animal #4
What do Animals #1, #2, #3, and #4 have in common?
They belong to the same phylum
Which animal is the most distantly related to the others?
Animal #3
What is the primary basis for Linnaeus' system of classification?
Morphology (Structural Similarities)
According to modern taxonomy, which of the following is used in addition to morphology to classify organisms?
Genetic similarities and evolutionary relationships
What does a branch point on a phylogenetic tree represent?
A common ancestor of two or more organisms
Which of the following is an example of a homologous structure?
All of the above
What is the closest relative to the Rotifers, according to the phylogenetic tree?
Roundworms
What is the purpose of the out-group in a cladogram?
To serve as a basis of comparison with the in-group
What is a characteristic of the in-group in a cladogram?
It possesses one or more derived characters
What do flowering plants, ferns, and gymnosperms have in common?
They all have vascular tissue
What is an example of a derived character in the given cladogram?
The presence of vascular tissue
Why are mosses used as the out-group in this cladogram?
Because they are only distantly related to the other organisms
Identify the relationships between different animal species based on their classification. Learn about the classification of insects and animals into different kingdoms, phyla, and classes.
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