Theory in science: A well tested explanation that unifies a broad range of observations and hypotheses, and enables scientists to make accurate predictions about new situations.
Theory everyday term: An idea used to account for a situation or justify a course of action.
D. all of these, models show multiple things.
The process of metal refining is done for the purpose of fixing the metals impurities through the reduction process. On the other hand, problems are encountered in doing this process. Metal refining produces refined metals but the main downside of this process is the production of too much waste after.
I believe it would be polyphyletic.
Polyphyletic groups are formed when two lineages convergently evolve similar character states. Organisms classified into the same polyphyletic group share phenetic homoplasies as opposed to homologies. The key difference between paraphyletic and polyphyletic groups is that paraphyletic contain their common ancestor, whereas polyphyletic groups do not.
The answer is PHAGOCYTOSIS.
Phagocytosis refers to the process by which a cell engulf a material or another cell. In unicellular organisms, phagocytosis is a mode of feeding while in eukaryotes, phagocytosis is the mean by which the defensive agents of the immune system attack foreign bodies which are found in the system.