San Diego and San Francisco are on opposite ends of the state and about 800 miles apart. They do not overlap. Having cleared that up, a large developed area of several cities is called a megalopolis.
Conurbation.
Overlapping
overlapping waves
Tessellation is a pattern of overlapping tiles, like roof tiles.
The term that describes species which arise in non-overlapping geographic regions is allopatric speciation. This occurs when a physical barrier separates a population, leading to genetic divergence and the formation of new species.
Pyroclastic describes a rock formation mostly consisting of rock fragments from volcanoes or crushed during an eruption.
Pyroclastic describes a rock formation mostly consisting of rock fragments from volcanoes or crushed during an eruption.
electrons are in a cloud outside the nucleus
Redundancy of the bowel is commonly known as redundant colon. This is a term that describes that the large intestine is longer than normal and has repetitive, overlapping loops.
"Packed quickly" is a phrase consisting of an adverb ("quickly") and a verb ("packed"). The verb in this phrase is "packed," which describes the action being performed.
The term "cultural region" is a noun phrase, consisting of a noun (region) modified by an adjective (cultural) that describes the type of region.
The term that describes the whole H2O unit is "molecule." H2O is a molecule consisting of two hydrogen atoms bonded to one oxygen atom.