Answer to Question 1
Limited changes in physical development: hair thins and tends to turn gray, may experience a receding hairline, storage of body fat increases; the distribution of fat changes to increased waist-to-hip ratio, tendency to put on weight until mid 50s: start to lose weight and slowly lose height after approximately age 60, bones start to shrink, hearing and vision degrade first before other senses.
Answer to Question 2
Answers can include: stress higher levels of environmental factors. Brumbauer (1997) found that after years of immigration, regardless of ethnicity, girls menstruate earlier in North America than in their countries of origin.
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