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What selective advantages did an exoskeleton or shell provide?
Demographic Conditions
Demographic conditions are the characteristics of a population, such as age, gender, income, and ethnicity, at a specific point in time.
Multiple Miscarriages
The occurrence of losing two or more pregnancies before the fetus can survive outside the womb, often investigated for underlying causes.
Poor Nutrition
A state of receiving insufficient or excessive amounts of nutrients leading to health problems and conditions such as obesity, malnutrition, and vitamin deficiencies.
Low-Birth-Weight
Describes infants who are born weighing less than 2,500 grams (5.5 pounds), which can lead to various health challenges and developmental issues.
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