The one abt respiration the answer is the first one and circulatory system is the last one that says “delivery molecules …”
Answer:
The answer should be I and III
Answer:
c tarnishes in air
Explanation:
After silver has been exposed to air that contains sulphur gases, discoloration would occur. there would be darkening that is caused by the reaction with gases.When any silver object tarnishes, it brings about a disfiguring of that object. Hydrogen sulphide would be needed for this to happen. silver sulphide is black and a if a thin layer should form on any surface, it ill darken it. This is what we refer to as tarnishing.
Answer:
ability to rust
Explanation:
i'm like 90% sure thats correct
