B. the units are based on multiples of 10
this is true because when you convert it makes conversion a lot easier then if you are not using the metric system
Answer:
a pure substance
Explanation:
A pure substance is made up of only one kind of matter and has definite properties. A pure substance has matter having an invariant chemical composition and distinct properties. A pure substance can be an element or a compound.
An element is a fundamental substance that cannot be separated into smaller substances by chemical method. A compound is a substance composed of two or more elements in fixed proportions and can be separated into smaller substances or elements by chemical methods only.
Symbiotic relationship is the relationship that the organisms in the ecosystem have. This is their way of interaction. Every organism has different interaction with the other. Based on the organisms given above which are the pistol shrimp and the gobies, being dependent on each other for shelter and protection shows the relationship of mutualism. This means that both benefit on each other.
I really want to say mitochondria as it has a two layered membrane and has its own separate DNA
85% sure the answer is C.
Let me know. Hope this helped