What is the advantage of having different shaped beaks?

One gene can influence trait(s). one trait can be determined by gene(s).

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation

Are the earth's ocean floor and continents the same age geologically? why or why not?