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.

Read this summary of a scientific theory: "cells are the most basic structural and functional units of life. all living organisms are made up of one or more cells. all cells that are alive in the world today came from pre-existing cells." which of the following would require this theory to be modified? -a.) a survey finds that a majority of people believe viruses carry out the basic processes of life. -b.) a prominent scientist says she feels strongly that one day the theory will be challenged by life on other planets. -c.) the dna of unicellular and multi-cellular organisms is shown to have many fundamental similarities. -d.) scientific observations show that microscopic organisms living in the deep ocean are not made up of cells.