Answer
Two examples of things which show both the commonality and the variety of individual kinds of gymnosperms: 1) Cones vary widely, though they all produce seeds, from those containing dry scales like pines to those which have soft, fruit-like structure such as junipers; 2) Leaves of gymnosperms all perform photosynthesis and are megaphylls but range from the scales of larch and pine to the fan-like blades of ginkgoes.
Work Step by Step
You can find more examples than this for your answer— just scan through Fig. 30.7 and find examples of similar structures and describe them.