Answer:
The United States and Mexico depend on each other more than ever for our economic well-being and competitiveness. We will sink or swim together in the global economy.
Explanation:
Layers of the soil are called horizons. Here are the horizons:
- Humus
- Topsoil
- Subsoil
- Fragmented rock
- Bedrock
Once a soil has developed, it forms layers called horizons. Beneath a surface layer of a plant remains, the topsoil is rich in decomposed plants and animal matter. The subsoil is mainly mineral particles, with much less organic material. The fragmented rock/bedrock is primarily small stones, and beneath it lies all bedrock.
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Answer:
d. clear evidence of land bridges, like the one connecting Alaska and eastern Russia, clearly exist and explain most of Wegner's observations without Continental Drift.
Explanation:
The correct answer for the given question is d. clear evidence of land bridges, like the one connecting Alaska and eastern Russia, clearly exist and explain most of Wegner's observations without Continental Drift.
The main objection to Wegener's hypothesis was his inability to identify a credible mechanism for continental drift.
Harold Jeffery pointed out that Wegener's proposition of the gravitational forces was not correct and that instead of breaking up land it would have brought Earth's rotation to halt in a matter of years.