Answer:
Explanation:
Natural science includes fields such as biology, and Social science includes fields such as economics, political science.
Basically the the countries made this system during/after the cold war. The first world is the highly developed countries with high literacy rates and less unemployment (mostly people thing of western countries aka the U.S). The second world is usually known by the Eastern Bloc who were former industrial socialists.
Untreated meningitis can lead to coma and disabilities, such as deafness, speech impairment, brain damage, blindness and paralysis.
Answer:
To avoid Hyper-oxygenation
Explanation:
Crucian carp have the ability to increase gill surface to maximize oxygen intake, or reduce overall area when under specif circumstances. If the fish does not need so much oxygen it will cover the protruding lamellae to reduce oxygen intake and avoid Hyper-oxygenation.
