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.
Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..
For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..
Different mental disorders are described here. Read this tutorial to get an overview of schizophrenia, affective mood di..
Regulation of Biological Systems tutorials are focused on the modulation of biological systems from cell to population l..
Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..
The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..