What role do white blood cells perform in a human body? protect against pathogens
conducting electrical impulses
secreting enzymes
carrying oxygen

the fossil record provides evidence of a common ancestor to many species.

the elements of art are the visual tools that the artist uses to create a composition. these are line, shape, color, value, form, texture, and space.

the principles of art and design are balance, contrast, emphasis, movement, pattern, rhythm, and unity/variety.