Explanation:
Given the importance of oxygen for animals, researchers suspected that a sudden increase in the gas to near-modern levels in the ocean could have spurred the Cambrian explosion. ... This supported the idea of oxygen as a key trigger for the evolutionary explosion.
Answer:
325
Explanation:
The gradutions are by 50. As there is no graduation after 300, it must be 325.
C. phyllite is the intermediate between slate and schist.
It is Tropical. Tropical climate zones are located between the tropic of cancer and the tropic of capricorn.
No, I don't think this is true.
Child mortality can be caused by among others: general poverty, lack of education among women, insufficient adults to take care of them (so Adult mortality can have an influence on child mortality too).
General poverty and lack of education in turn can be related to political instability, for example when there is a civil war.
