is system framework (like UIKIt.framework,CoreGraphics.framework) static library or dynamic library

is system framework (like UIKIt.framework,CoreGraphics.framework) static
library or dynamic library

In xcode project, is system framework (like
UIKIt.framework,CoreGraphics.framework) static library or dynamic library
or something else? Is it possible that use Mac OS X's framework (like
Quartz.framework) in ios project?