Answer:
Based on the given diagrams of animal and plant cells, here are the answers to questions 19-22:
19. The letter C indicates watery cell fluid. In both the animal and plant cells, the cytoplasm represents the watery cell fluid that fills the interior of the cell. Therefore, letter C corresponds to the watery cell fluid.
20. The letter D indicates the location of chromosomes. Chromosomes contain the genetic material of the cell and are found within the nucleus. In both the animal and plant cells, the nucleus is represented by letter D, making it the location of the chromosomes.
21. The letter A indicates where photosynthesis occurs. In the diagram of the plant cell, the chloroplasts are present, and they are responsible for carrying out photosynthesis. Letter A corresponds to the chloroplasts, indicating that photosynthesis occurs in this location.
22. The letter D indicates the structure that directs the function of the other cell parts. In both the animal and plant cells, the nucleus is the structure that directs the function of the other cell parts. It contains the genetic information and controls the activities of the cell, making it the structure that directs the functions of other cell parts.
In summary, the letter C indicates watery cell fluid, the letter D indicates the location of chromosomes, the letter A indicates where photosynthesis occurs, and the letter D indicates the structure that directs the function of the other cell parts.