Question

pine forests separated by a mountain range, a canyon, or a body of water contain isolated populations of organisms. small fish called cichlids live in the same lake but at different depths, which cues differential reproduction. a population of ants are separated by a new, large housing development that prohibits gene flow. aberrs squirrels and kaibab squirrels are two species that share a common ancestry but no longer interbreed because they are separated by the grand canyon. self - fertilization in plants allows a new species to arise amidst the ancestral population. medium size ground finches living on the same island develop different bill sizes, which alters their mating signals. sympatric speciation allopatric speciation

Explanation:

Sympatric speciation occurs when new species form from a single ancestral population while occupying the same geographic area, with reproductive isolation caused by factors like resource partitioning, mating signals, or self-fertilization. Allopatric speciation occurs when populations are physically separated by a geographic barrier, preventing gene flow and leading to speciation.

Answer:

Sympatric speciation

• Small fish called cichlids live in the same lake but at different depths, which cues differential reproduction
• Self-fertilization in plants allows a new species to arise amidst the ancestral population
• Medium size ground finches living on the same island develop different bill sizes, which alters their mating signals

Allopatric speciation

• Pine forests separated by a mountain range, a canyon, or a body of water contain isolated populations of organisms
• A population of ants are separated by a new, large housing development that prohibits gene flow
• Abert's squirrels and Kaibab squirrels are two species that share a common ancestry but no longer interbreed because they are separated by the Grand Canyon