SCIENCE
VIRUS AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They diverged from a common ancestor before eukaryotes
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They converged from a common ancestor before eukaryotes
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They came from eukaryotes and became prokaryotes
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There should be more domains
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Detailed explanation-1: -What is thought to be true about the three domains of living things? They diverged from a common ancestor before the evolution of the main groups of eukaryotes.
Detailed explanation-2: -Because all cells are similar in nature, it is generally thought that all cells came from a common ancestor cell termed the last universal common ancestor (LUCA). These LUCAs eventually evolved into three different cell types, each representing a domain. The three domains are the Archaea, the Bacteria, and the Eukarya.
Detailed explanation-3: -All of life can be divided into three domains, based on the type of cell of the organism: Bacteria: cells do not contain a nucleus. Archaea: cells do not contain a nucleus; they have a different cell wall from bacteria. Eukarya: cells do contain a nucleus.
Detailed explanation-4: -This phylogeny overturned the eukaryote-prokaryote dichotomy by showing that the 16S rRNA tree neatly divided into three major branches, which became known as the three domains of (cellular) life: Bacteria, Archaea and Eukarya (Woese et al. 1990).