Factors or conditions that maintain the disabling symptoms in an individual.
The presence of a disease or disorder can be explained by the following factors:
…and the absence of :
Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..
This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..
Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..
The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..
Plantlife can be studied at a variety of levels, from the molecular, genetic and biochemical level through organelles, c..