Answer:
I think it's a and c
Explanation:
Drugs make you have less sleep. That is a increasing sleep problem. If teens don't get sleep, they will use drugs thinking that they may keep them awake.
Brainliest please?
XxRoadToAcexX
Tactos y sentidos
I think thats it, hope is right
Researchers can now see actual thought processes by measuring the increases of blood flow and oxygen to different sections of the brain.
i find this topic very interesting and know a lot about it,, so if you have any further questions feel free to let me know id love to help.
:)
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.
