What basic unit of heredity is found on segments of DNA and are passed on from parent to offspring?

DNA replication allows the basic units of heredity found on segments of DNA, called, to be passed on from parent to offspring. DNA replication allows the basic units of heredity found on segments of DNA, called, to be passed on from parent to offspring.

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chordata is the answer

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.