What caused England's Biston betularia moth populations to change over time from light colored to dark colored?

Types of scientific inquiry that biologist engage in that cannot be completely controlled

Where can dna be found in a prokaryotic cell

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