A Tentative explanation of a phenomenon that can be tested I believe is a scientific experiment.<span>
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Depression can make someone feel like they aren't good enough or that the world would be better off without them. The person who is depressed might act happy all the time but may be sad and hurting inside. When you are depressed it is hard to tell people or find someone who wants to help.
Answer: Tim because he stay in shape and does smoke so he has a higher chance of not getting cancer
Answer:
have u looked online? i do it a lot and get answers or quizlet works
Explanation:
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.
