18 Questions
What is the main reason behind the reclassification of Prokaryotae into Bacteria and Archaea?
Differences in RNA markers and biochemistry
What is the term for the grouping of organisms into 8 levels of classification based on similarities and differences?
Taxonomic hierarchy
Which of the following is NOT a characteristic of eukaryotes?
Are all unicellular
What is the most specific level of classification in the taxonomic hierarchy?
Species
What is the term for the large group that includes all organisms without a nucleus?
Prokaryotae
Why do classification systems continually evolve?
As new molecular evidence is generated
What is the study of the evolutionary history of a group of organisms called?
Phylogenetics
What is the binomial system used for in classification?
To assign a unique, internationally recognized name to a species
What is the purpose of a phylogeny tree?
To display the evolutionary relationships between organisms
What is the most closely related species to humans?
Chimpanzee
What is the smallest group of organisms that share a common ancestor?
Species
What type of evidence is now used to classify organisms?
Observable features, embryonic development, fossil evidence, and molecular evidence
What is the basis of molecular evidence in classification?
Analysis of similarities between DNA and proteins
What can be used to determine how closely related species are?
Differences in DNA base sequences
Which species are more closely related, and why?
Species A and B, because they have 5 differences
What is the principle behind DNA sequencing analysis?
The more closely DNA sequences overlap, the more closely species are related
What is the significance of DNA conservation in molecular evolution?
It enables the analysis of DNA sequences
What is the relationship between DNA sequences and phylogeny?
The more closely DNA sequences overlap, the more closely related species are on the phylogeny tree
Learn about the classification of organisms into 8 levels of taxonomic hierarchy, from domains to species. Understand the principles of similarity and difference that govern this classification.
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