To make them easier to study.
The salt could become rotten or if exposed to something that is used alot it could be bad to touch <span />
Precambrian which lasted 291 million years!
Hope this helps!
-Payshence
Answer:
The correct answer would be protista.
Explanation:
The kingdom Protista includes the unicellular eukaryotes. Protists are a diverse kingdom of living beings that are mostly unicellular but some are multicellular. These multicellular organism does not show highly specialized tissues organization.
They show similar characteristics to animals, plants or fungi. Protists can be heterotrophic or autotrophic such as algae, kelp, Paramecium.
Thus, the correct answer is Protista