Evolution Unit Test Which of the following is the best definition of a homologous structure?
Similar structures in
same organisms.
Similar structures in different organisms who have a common ancestor.
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Different structures in the same kind of organisms.
Two kinds of bones that can be found in multiple parts of the body.

Kidney stones are tiny crystals of calcium or magnesium that block the narrow sections of the excretory system. which symptoms would a person with kidney stones experience? a. inability to store urine; pain in the bladder b. inability to store urine; pain in the urethra c. reduced urine flow; pain in the bladder d. reduced urine flow; pain in the urethra