Is photoshop vector based or raster based?

Ablind girl lost her pencil, book and what did she lose first? (this is really good for people who don't have an adequate amount of points! )

What computer software program was used to create the design for the structure above? what is the main advantage to this program?

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. drag each phase of mitosis to the correct description.