Answer:
earth plates move on top of the mantle like a RAFT floats on water
<span>it was a source of food and trade</span>
Answer:
C.2
Explanation:
Respiration does not release oxygen to the atmosphere
Chemosynthesis and photosynthesis releases oxygen to the environment
While combustion use oxygen up
Answer:
the system is very corrupt and the leaders are horrible
Explanation:
I really hope this helps.
The answer is B.
The primary positive effect of the Columbian exchange was the introduction of New World crops, such as potatoes and corn, to the Old World. The most significant negative effects were the transmission of African populations into slavery and the exchange of diseases between the Old and New World.
