The graph below is of directional selection. which statement can be supported by the evidence shown in the graph?

a
directional selection occurs when phenotypes at both extremes of the phenotypic distribution are selected against.

b
directional selection occurs when one of two extreme phenotypes is selected against.

c
directional selection occurs when one of two extreme phenotypes is selected for.

d
directional selection occurs when phenotypes in the middle of the range are selected against.

Explain light independent reactions

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

Por qué crees que los huevos con cáscara se llaman amnióticos?