subkingdom
One of the several primary divisions of either the animal, or vegetable kingdom, as, in zoology, the vertebrata, tunicata, mollusca, articulata, molluscoidea, echinodermata, Coelentera, and the protozoa; in botany, the phanerogamia, and the cryptogamia.
This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..
Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..
The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and..
The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..
This tutorial describes the role of gibberellin family in plants. Find out the effects of gibberellin on plant growth an..
Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..