Solids
The particles in solids are very close together. They are tightly packed, giving solids high densities.Liquids
The particles in liquids are close together. Although they are randomly arranged, they are still tightly packed, giving liquids high densities. The density of a substance as a liquid is usually only slightly less than its density as a solid. For example, the density of solid aluminium is 2.72 g/cm3 and the density of liquid aluminium is 2.38 g/cm3. This means that liquid aluminium floats on top of solid aluminium.Water is different from most substances: it is less dense as a solid than as a liquid, because its particles move apart slightly on freezing. This is why ice cubes and icebergs float on liquid water.Gases
The particles in gases are very far apart, so gases have a very low density.
These two closely related species have evolved to use the resources of an ecosystem in a different way, in order to be able to cohabit and coexist. Niche is an ecological term used to refer to the ecological roles of species in an ecosystem. In the same context, niche differentiation refers to the process by which competing species use the environment differently in a way that helps them to coexist. In addition, interspecific competition is another ecological term used to describe how individuals of different species compete for the same resources in an ecosystem. When individuals of these two species of swallows live on the same ecosystem, they compete against the resources (food and habitat) that are available in this habitat. Due to niche differentiation, they are able to coexist in the same ecosystem by limiting their habitat.
I'm pretty sure your talking about Vertebrates
Answer:
You could also define it as how a disease develops
Explanation:
A homogeneous mixture made of two or more substances.