Most of the larval forms swim freely at the surface of the sea, and many show special adaptations to this habit of life.
Make adaptations to any diagram you choose.
Such adaptations are well seen in the leaf of the holly (Ilex aquifolium).
These books are of course anonymous, most of them being translations and adaptations.
Although many different rotations of crops are practised, they may for the most part be considered as little more than local adaptations of the system of alternating root-crops and leguminous crops with cereal crops, as exemplified in the old four-course rotation - roots, barley, clover, wheat.