Why are most finches which normally eat seeds unable to eat flower nectar like hummingbirds

1flowers in finches' environments do not produce nectar.
2most finches' beaks are too long and narrow to collect nectar.
3most finches' beaks are too short and broad to collect nectar.
4there are no flowers in finches' environments.

Resperation is a way to release carbon back into the atmosphere

1. -define adaptation2 explain darwin's theories of descent with modification and natural selection in detail3. -explain how each of these provides evidence for evolution: a. -fossil record, including superposition and transitional fossilsb-anatomy, including homologous structuresc-biological molecules, including dna and proteins4. -explain the difference between convergent and divergent evolution.5. -define and give three examples of artificial selection6. -define and give one example of coevolution.7. -explain biodiversity and how it benefits humans.8. -explain a type of population lest affected by environmental change.

What kinds of foods are high in lipids?