Answer: Prefix: Preobservation
Sufix: Observations
Explanation:
Homologous stuctures because, homo means same implying that the cell/animal is not change as it continues to reproduce
The two arteries that support the brain are the vertebrals and internal carotids. Hope this helps!
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He could not explain why the continents were moving.
Assuming that you're referring to forest ecosystem, the two ecological benefits of this ecosystem are :
- it provides habitats for many organisms
- It provide Oxygen supply for the world