| 1. | Biological factors such as age and hormone levels can affect muscle hypertrophy.
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| 2. | This may represent a biological factor underlying ethnocentrism and group selection ".
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| 3. | Several biological factors such as age and nutrition can affect muscle hypertrophy.
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| 4. | Several prenatal, biological factors, including genes and hormones, may affect gender identity.
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| 5. | Biological factors include breeding, predation, concentration of phytoplankton, and vertical migration.
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| 6. | Biological factors also influence which genes in a genome lose or accumulate introns.
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| 7. | One of these biological factors is the production of insulin autoantibodies.
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| 8. | A number of biological factors also influence the number of species.
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| 9. | -Medical studies haven't identified biological factors that consistently cause the disorder.
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| 10. | Biological factors that influence gender identity include pre-and post-natal hormone levels.
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