It is because the six-kingdom is more like newer and every time a new part of a kingdom is discoverd someone uses it and then scientists use it more and more.So then they use it until they find a better one but they still use the previewes ones.
Most scientists accept the traditional five-kingdom classification system, which includes the kingdoms of Animalia, Plantae, Fungi, Protista, and Monera. However, some scientists now prefer the three-domain system, which categorizes organisms into Bacteria, Archaea, and Eukarya.
Scientists use a classification system called taxonomy to categorize plants and animals based on their shared characteristics. This system groups organisms into hierarchical categories like kingdom, phylum, class, order, family, genus, and species. By classifying organisms in this way, scientists can better understand their relationships, evolutionary history, and biological characteristics.
The metric system.
Metric system simply refers to a system of measurement in which the values are decimalized (i.e. one unit differs from another by a power of 10). The metric system commonly used in the world today is referred to by many scientists as "SI" which is short for Systeme International d'Unites, French for International System of Units.
Taxonomy is important because it helps scientists to organize and classify organisms based on their similarities and differences, providing a framework for understanding evolutionary relationships. This classification system allows for easier communication among scientists and provides a basis for further research into biodiversity and the natural world.
SI system is used by scientists. It is one of the standard system adopted by scientists.
Animal testing is to find out how medicines work and how they help or don't help. Instead of using people for this system they use animals. Animal testing is to find out how medicines work and how they help or don't help. Instead of using people for this system they use animals.
Metric System
The metric system.
They use the Metric system.
metric system
In the US, scientists and medicine primarily use the metric system of measurement, which is also known as the International System of Units (SI). This system is used for its consistency and compatibility with scientific research and global standardization.
They use the metric system.
Generally they use the SI system
metric system
Scientists typically use the International System of Units (SI) for measurements. This system includes units such as meters for distance, kilograms for mass, and seconds for time. Using a standardized system like SI ensures consistency and clear communication in scientific research.
Because they are conservative. The rest of the world, apart form Burma and Liberia, have adopted the SI system because it is a far superior system of measurement but the US stubbornly does not view that as progress. Is that because it was not led by Americans, I wonder! US scientists have adopted it - and when NASA scientists did not, it led to the disaster of the Mars climate orbiter.