They cry because they know that they have been born into a cruel world that will screw them over at every turn.
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FAS children are generally exposed to ponderously abusive amounts of alcohol. We're not likely to be confused by "moderation" here. Typical ingestion histories range from two or three six-packs of beer or the better part of a fifth of distilled spirits a day.
There have been no known cases of "full blown" FAS in children whose mothers consumed moderate amounts of alcohol; this is even more telling considering that patients virtually always understate their alcohol intake. There have been no cases reported in which wine was the source of ethanol.
Clearly, there may be compounding factors that stress the fetus. The typical profile of the FAS mother is a 30-plus-year old alcoholic in poor health, taking poor nutrition, smoking, living in a chaotic environment alone or in the company of a male alcoholic.
Most of the organ systems in the human fetus develop in the first two months after conception, and it is likely that most of the physical malformations occur from early exposure to episodic, very high levels of alcohol (often from binge drinking or sustained high levels with daily intoxication, the latter being the most common pattern).
Physical growth of the fetus occurs throughout pregnancy, and the small size of FAS babies likely relates to toxic effects upon cell growth throughout the nine months. Brain growth accelerates markedly in the third trimester and cessation of maternal alcohol abuse before this point can considerably reduce the neurological handicaps of FAS.
The answer is option A
Explanation:
Serous membranes need more epithelial layers than other kinds of membranes when occurring in paired layers help the serous membrane perform its function.
The serous membrane that lines the thoracic cavity and covers the lungs is called pleura.
The serous membrane enclose several body cavities known as serous cavities, in which they secrete a lubricating fluid that reduces the friction from muscle movement.
It is a connective tissue layer which binds together structures than reducing the reducing friction between them.
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Greater contact with humans, who passed on the disease is likely the primary reason why this occurred.
<h3>What do you mean by population bottleneck?</h3>
Specified, widespread violence or purposeful culling, human population planning, and other human actions such as famine, earthquakes, floods, fires, disease, and droughts can all cause population bottlenecks. Population bottlenecks can also occur owing to genetic bottlenecks. As a result, a smaller population with less genetic variety is left to transmit genes to future generations of offspring through sexual reproduction. Such events can limit the variation in a population's gene pool. Only when gene flow from another group happens or very slowly over time as random mutations take place, genetic diversity rises, but it still remains lower.
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