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