Bryophytes are also called NON VASCULAR plants.
Bryophytes are a group of small and green plants, which are made up majorly of hornsworth, liverwort and mosses. They can be found on land or in aquatic environment. These plants do not produce flowers, therefore they are always described as seedless.
Crude density and ecological density are both related but different. Ecological density is the portion of land that a certain species can colonize, where as crude density is the land within the organism's range.
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Basically, the tendency to maintain a stable, relatively constant internal environment is called homeostasis. The body maintains homeostasis for many factors in addition to temperature. For instance, the concentration of various ions in your blood must be kept steady, along with pH and the concentration of glucose.
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