A shared derived characteristics is usually a homologous structure, such as a backbone, that is shared by all organisms in a group.
It is two or more objects and different things that can be removed from each other.
To know the density you also need to know the volume of the rock.
Answer:I think it could be A or B but I would choose A.
Explanation:
Answer: i would say D or the last one.
Explanation: According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants. The law of conservation of mass is useful for a number of calculations and can be used to solve for unknown masses, such the amount of gas consumed or produced during a reaction.
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