The least invasive way to determine population size is to use the sampling technique. If you are able to determine how many subjects are in a few small areas, you may be able to estimate how many are in the entire area. An example would be, if there are 10 people living in one apartment building, and there are a total of 50 apartment buildings in the complex, an estimate of your population size would be 500, assuming there are no empty apartments.
idk
At least 16 weeks before you can tell accurately by ultrasound. Some people/techniques can now determine it as early as 10 weeks, but it's safest, cheapest, and non-invasive to do it by ultrasound. Some people can tell as early as 14 weeks, but most cases it has to be at least 16.
cervical
In order of least (population) to most: Wyoming, Vermont, North Dakota, Alaska, and South Dakota.
AntarcticaAntarctica, obviously, since there are only about 5000 people there, at most, on a seasonal basis. Australia has the smallest size and population of the other six.
There was regret and population of colonists were droping by at least 50%
they kill most of them
they kill most of them
Just switch population with ecosystem to get them most to least complex.
The most prevalent illegal drug is marijuana, about 40% of the US population have used it at least once in their life.
One of the world's most invasive pest species, the red-eared slider turtle.
Most of Balinese are Hindus at least 95% of the population are Hindu as it a very popular religion.