The three-domain system is a biological classification introduced by Carl Woese et al.in 1977[1][2] that divides cellular life forms into archaea, bacteria, and eukaryote domains. In particular, it emphasizes the separation of prokaryotes into two groups, originally called Eubacteria (now Bacteria) and Archaebacteria(now Archaea). Woese argued that, on the basis of differences in 16S rRNA genes, these two groups and the eukaryotes each arose separately from an ancestor with poorly developed genetic machinery, often called a progenote. To reflect these primary lines of descent, he treated each as a domain, divided into several different kingdoms. Woese initially used the term "kingdom" to refer to the three primary phylogenic groupings, and this nomenclature was widely used until the term "domain" was adopted in 1990.[2]
Parts of the three-domain theory have been challenged by scientists such as Radhey Gupta, who argues that the primary division within prokaryotes should be between those surrounded by a single membrane, and those with two membranes.
Answer:
Some of the healthcare policy issues debated throughout the United States' history have ... Title XVIII established Medicare, which provided public health coverage to ... The task force created a 1,342-page bill, which President Clinton unveiled
Explanation:
Cardiovascular fitness and can you give me brainliest
Answer:D) college students are not randomly selected from the larger population, and they may not represent all young adults in our society.
Explanation:
Kickball-Ball is rolled towards the batter and kicked
Softball- Ball is pitched in the air and struck by a bat
Whiffleball- Plastic ball struck by plastic bat
