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?

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different