Tunica intima
Tunica media
Tunica externa
They are low in oxygen which is not usually found in arteries.
Yes, the composition of the rocks is as a result of the distinct chemical composition.
Physical mixture
You think probable to a chemical compound.
The color of a mineral sample is determined by its chemical composition
The same gasses that comprise regular air: nitrogen, oxygen, carbon dioxide, water vapor, and trace amounts of others.
There is no answer to this. Bacteria and Archae are two domains, of which the other is Eukarya. These three domains together comprise "life" in general. Both domains are prokaryotes, but they can not be combined into a larger classification without the addition of Eukarya as well.
Homogeneous mixtures have uniform composition throughout, with the same properties in all parts. Heterogeneous mixtures have non-uniform composition, with distinct phases or regions that can be visually identified.
A soil horizon is a layer of soil, approximately parallel to the soil surface, with distinct characteristics that differ from those above and below. It is defined by its unique composition, texture, structure, and color, making it a distinct zone within the soil profile.
Food coloring isn't heterogeneous because it is a proper solution and has a uniform composition. Heterogeneous means that it has distinct properties, more than one substance, and it does not have a uniform composition.
A pure compound is made up entirely of one substance that has a single chemical property. A mixture is made up of two or more pure compounds with distinct chemical properties.
A pure material is called a substance. It is a form of matter that has uniform and definite composition, with distinct physical and chemical properties.