A few of the closely related mites also infest humans, causing intense itching, and others cause allergic diseases, including hay fever, asthma and eczema.
Closely related fields include plant morphology (structure of plants), plant ecology (interactions with the environment), phytochemistry (biochemistry of plants), cell biology, genetics, biophysics and molecular biology.
The rule against perpetuities is closely related to another doctrine in the common law of property, the rule against unreasonable restraints on alienation.
