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.
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Since the options are not given the question is incomplete.
Which of the following is not a health related component of fitness?
A). Body composition
B). Flexibility
C). Muscular strength and endurance
D). Stress management
Answer: Stress management
Explanation:
Fitness in terms of health is associated with physical fitness. The physical fitness involves the dynamics of working and functioning of the physical body. This is associated with composition of the body, body shape, weight regulation, flexibility, strength and endurance required to perform a task and other physical attributes.
The stress management is related with mental fitness. It helps in reducing mental stress and improving thinking abilities, which can help in overcoming stress.
