The 3 main regions of the brain are the cerebrum, cerebellum, brainstem.
There are many reasons to why slaves were essential in the colonial economy:
Slaves were generally used more in the south, because large plantations were found there, which meant that the need for large amounts of workers.
Slaves provided cheap labors, and as they were not "citizens" of the US, they were not allowed their rights.
Slaves were also relatively easy to buy and replace, however, their survival rates were not that good after they traveled long distance.
etc.
hope this helps
<span>There are other avenues to find the cure to diseases that do not involve exploiting fetuses.
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Well, Angiosperms are grouped up with with the dicots and monocots.
it's the structure of the nucleotides
the basic building unit of nucleic acid
