What is the term for when plants move toward a light source

Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

What are some natural processes that represent physical and chemical changes?

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