Answer: It is supported by hypotheses, repeated tests and law from one or more fields of science.
Explanation:
In the context of science, a theory is a well-established explanation for scientific data. Theories typically cannot be proven, but they can become established if they are tested by several different scientific investigators.
The answer to the question of what relationship is classified as host-parasite. A parasitic relationship is one in which one organism, the parasite, lives off of another organism, the host, harming it and possibly causing death. A few examples of parasites are tapeworms, fleas, and barnacles. The parasite lives on or in the body of the host.
Answer:
The kingdom Plantae consists of four major plant groups on land: bryophytes (mosses), pteridophytes (ferns), gymnosperms (cone-bearing plants), and angiosperms (flowering plants). Plants may be categorized as vascular or nonvascular. A vascular plant has tissues for transporting water or sap. Nonvascular plants do not.