Once a niche is left vacant, what happens? a The niche disappears
b A new species evolves to fill the niche
The niche adapts for an existing species

The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. a large increase in pressure will a. lower the freezing point b. raise the freezing point c. lower the boiling point d. raise the triple point e. lower the triple point