Select the correct answer. What is a tribute nation? A. a nation that pays another nation for protection B. a nation that dominates a weak nation C. a nation that is not dependent on any other nation D. a nation that is frequently attacked by foreigners

The cluster of developing cells from conception until birth is called an

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano

Crossing over is a method of (blank)?