The classification system for organisms has changed from seven levels to eight. This happened because scientific consensus changed as scientists learned more about organisms.
scientists did not test the seven-level system often enough to lead to consensus.
the eight-level system of classification is an emerging idea that needs more testing.
the seven-level system of classification was not supported by scientists.

scientific consensus changed as scientists learned more about organisms.

Explanation:

The classification system for organisms has changed from seven levels to eight level of classification system because scientists learned more about organisms. This new learned information allow scientists to change the existing classification system. When the scientist find new species that may have to change classification systems in order to accommodate them and placed them accurately in the classification system.

A. scientific consensus changed as scientists learned more about organisms.

Explanation:

i think its white blood cells

i hope this