If in a developed nation the width of the bars for an age group of 35 to 40 years decreases for three successive censuses, which one of the following statements is likely to be true?
A) There has been high emigration in that age group.
B) The fertility has increased in that age group.
C) The fertility has decreased in that age group.
D) Other age groups have increased their fertility to compensate for the 35 to 40 age group.
Question 2
Good health in the modern world, with few cases of bacterial infection, is largely the result of
A) the development and widespread use of new immunizations.
B) clean water supplies and proper treatment of sewage.
C) widespread use of bleach, antibiotics, and antibacterial soaps.
D) frequent bathing and washing of clothing and dishes.
Adolescents are preoccupied with finding their place in the social group as well as society.
Atmospheric pressure decreases with increase in altitude.
How long does it take for 90% of a sample of strontium-90 (half-life of 28.8 years) to decay?
Baby's eyes are developed in 6th week of pregnancy
Remaining health-adjusted life expectancy (years) at age 25
Prevalence of good health in Canadians aged 65 years and older