Asked by Carina Darosa on Jul 24, 2024
Verified
The three-domain system is primarily based on
A) molecular data showing eukaryotes are much more closely related than previously thought.
B) structural data showing eukaryotes are far more diverse than previously thought.
C) molecular data showing prokaryotes are far more diverse than previously thought.
D) new biogeographical data showing prokaryotes are far more diverse than previously thought.
E) new classification concepts that have shown everything except molecular data to be irrelevant.
Three-Domain System
A classification system in biology that divides cellular life forms into three domains: Archaea, Bacteria, and Eukarya.
Molecular Data
Information at the molecular level, including structures, sequences, or any data related to the molecular composition and interactions within biological or chemical entities.
Prokaryotes
Single-celled organisms that lack a nucleus and other membrane-bound organelles, generally including bacteria and archaea.
- Acknowledge the significance of taxonomy and phylogeny in comprehending the connections between evolutionary lineages.
Verified Answer
MN
Mamosa NtsenyeoJul 28, 2024
Final Answer :
C
Explanation :
The three-domain system is primarily based on molecular data showing prokaryotes are far more diverse than previously thought. This system recognizes the fundamental division between archaea and bacteria, based on their unique molecular and genetic characteristics. The Eukarya are placed in a separate domain due to their distinct membrane-bound nucleus and other cell structures. The system was proposed by Carl Woese in 1977 based on his studies of ribosomal RNA sequencing.
Learning Objectives
- Acknowledge the significance of taxonomy and phylogeny in comprehending the connections between evolutionary lineages.