In the years from 1900 to the present, life expectancy in the United States has drastically increased.
The tremendous increase in life expectancy during the last century may be the greatest human achievement.
In the 110 years between 1900 and 2010, the United States' life expectancy at birth increased from 47.3 to 78.7 years (Centers for Disease Control and Prevention/National Center for Health Statistics [CDC/NCHS], 2012, 2013). Declines in infectious diseases and fatalities disproportionately among the young caused this longer lifespan. After infectious diseases accounted for the majority of deaths, the leading causes of mortality were cancer and cardiovascular diseases. In the second half of the 20th century, these then became the focus of science and medicine.
To learn more about life expectancy click here:
brainly.com/question/7184917
#SPJ9
Maturation is a threat to internal validity stemming from either long-term or short-term physiological changes occurring within the participants that may influence the dependent variable.
<h3>
What are physiological changes?</h3>
Ageing causes physiological changes in all organ systems. Arteriosclerosis develops, blood pressure rises, and cardiac output declines. Lung function is compromised, vital capacity is reduced, and expiratory flow rates are slowed.
Pregnancy causes a number of physiological changes in the mother, such as an increase in fat and total body water, a drop in plasma protein concentrations, particularly albumin, an increase in blood volume, cardiac output, and blood flow to the kidneys, and a decrease in blood pressure.
Learn more about physiological changes here:
brainly.com/question/14970685
#SPJ4
At the time of inspection of the field, the referees noted that the field has multiple lines of different colors and the soccer field areas contrast in color with the other markings. The referees should begin the contest as this is permitted by rule.
Inspection means careful assessment. The primary goal of inspections is assembly patron requirements and stopping defective merchandise from being disbursed. it's far simple that a number of the product defects cannot be checked or fixed at the very last manufacturing stage.
A pitch inspection is carried out by the referee earlier than a fit takes vicinity. The referee checks all regions of the pitch to make sure it is secure and offers the inexperienced light to the groups around 30-60 minutes earlier than kick-off.
The referee is the individual chargeable for deciphering and imposing the laws of the sport in the course of a healthy. The referee is the final choice-making authority on all facts connected with play and is in shape respectable with the authority to start and forestall play and impose disciplinary motion in opposition to gamers and coaches during a fit.
Learn more about Inspection here:- brainly.com/question/11544805
#SBJ4
Answer:
According to the latest notification issued by the ICSE / ISC Board, the decision to reduce the syllabus will be applicable for Class 9 to Class 12 students and has been taken to reduce the burden amid limited teaching via online classes
