Which statement applies only to the axial skeleton, not the appendicular skeleton?
a. it contains a pivot joint .
b. it has muscles attached that work in pairs .
c. it contains red bone marrow.
d. it possesses fossa for bone articulation.
e. it protects the heart and lungs.

The distant ancestors of tigers may have had bodies without stripes. use the theory of natural selection to explain how tigers may have evolved to have stripes.

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

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?