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Possible symbiotic or endosymbiotic relationships that gave rise to the first eukaryotic cells
Relationships between direction of flow of blood and water or air in different vertebrates.
Dominance relationships among individuals play an important role in many primate societies.
This chart illustrates the four quadrants in which we can place the relationships between the state
Sibling relationships can be intense, in terms of both having fun together and engaging in conflict.
The Effect of Group Size on Relationships