The answer to this would be false. Hope this Helps:)))
Answer:
If the duration of life on Earth was on a scale of 20,000 days, the human species would be present in the Earth for approximately 9 days.
Explanation:
We can't be sure about the exactly age of the Earth, but we can base our calculus in a number between 4400 and 4600 million years, because the most accepted researches shows numbers in this span of time. We can take the average of those limits: 4500 million years.
On another hand the presence in the Earth of human species has not a precise date because of the it does not have a precise date for two main reasons, the scientific evidence does not include all the human species that existed on Earth but it is a very incomplete evidence and besides being an evolutionary phenomenon it is not easy to determine from what moment We can consider that a species belongs to the human race or not. In any case, we take the approximate date of the scientific evidence of the existence of human species in an age of 2 million years.
With both numbers we can calculate the proportion in the scale of 20 thousand years throw the following formula:
PHS = 20000 years . 2 million years / 4500 million years = 8.9 years
PHS: Presence of Human Species
Answer:
C
Explanation:
The Earth is 4.543 billion years old!!
Answer:
Brain drain is the emigration of individual who are highly proficient or qualified in their field of study .
Explanation:
Brain drain is the emigration of individual who are highly proficient or qualified in their field of study . The departure of these group of professional may be due to better living condition or higher salary.
In other words brain drain is when a country losses it talented or highly skilled or educated workers to other countries through migration. Brain drain is considered a big problem to the society because competent hands migrates to another country causing more economic hardship to the country they left. The emigrants contribute to the expertise of another country. This kind of movement occurs from a developing countries to a developed country.
The impacts of Brain drain on developing countries are numerous but it is more on the negative side.
The phenomenon has caused a harmful effect on developing countries mostly in Africa. As this talented individuals move to a developed countries they become richer and the developing countries becomes poorer. The resulting impact in developing countries are lack of innovation and industrial growth, economic instability which leads to unemployment , Political instability and loss of the country's investment in education , loss of tax revenue and shortage of skilled workers.
The positive impact is that the workers from developing countries tend to improve in skills . Another benefits is remittance; this skilled workers from developing countries might send money home and this might stimulate the economy.
