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:
PIM is a personal/product information manager
Explanation:
Vegans do not eat any animal product including dairy and fish
Answer:
answer A
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Hope this helps you and good luck :)
Explanation:
Cultivar tus propios alimentos puede ser una tarea que da satisfacción y fomenta la alimentación sana, orgánica y libre de pesticidas.
Los recursos imprescindibles para el cultivo de alimentos son la elección de los alimentos que se quieren cultivar y a partir de ahí elegir el suelo ideal para el desarrollo de las plantas, utilizando compuestos que se pueden preparar en casa como compost orgánico a base de piel de vegetales.
También es necesario elegir la forma a plantar, ya sea mediante plántulas, semillas, tubérculos, etc. Es importante recordar que es fundamental que utilices agua de calidad para regar tu suelo para que no haya contaminación de los alimentos.
También es fundamental que el cultivo se realice en un ambiente con exposición a la luz solar, para que exista el eficaz desarrollo y producción de carbohidratos a través de la fotosíntesis.
