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.
2,500 is the answer hope this helps.
Can i have brainlist
Answer:
A) Preoperational stage is the correct answer
Explanation:
Preoperational stage: It is a second of a cognitive development that starts at the age of around two.which children begin to talk and it last at the age of approximately seven.
The features of the preoperational stage are:
- children develop imagination.
- They develop a memory that helps them to know the difference in the past and future.
It's an act of controlling or portioning in regards to food. Regulating "big foods" or unhealthy foods who be controlling how much you each of these foods.
Answer:
Use insect repellent, wear long-sleeved shirts and long pants, and control mosquitoes inside and outside your home. Each year, an estimated 400 million people are infected with dengue virus. About 100 million get sick.
