Part of a bird's digestive tract, called a gizzard, is able to break up large chunks of food at an extremely fast rate. it is difficult for scientists to watch a gizzard functioning in a live bird. how would building a model of a gizzard a scientist?

Which best describes this behavior? it is beneficial only to the males that do not fertilize eggs. it is beneficial only to the female workers that are not fertilized. it is beneficial to each one of the individual colony members. it is beneficial to the whole species, but not to all of the individual members.