What is the principle that new cells arise from existing cells part of?
A.
protein synthesis
B.
an ecosystem
C.
cell theory
D.
levels of organization
C. cell theory
A substance is being examined that has been found at a crime scene. Using a chemical test, it is determined that glycogen is present in the substance. What does this mean for the investigation?
A.
The substance is from a human or animal source.
B.
The substance is the poison ricin.
C.
The substance is from a plant source.
D.
The substance is a lipid.
A. The substance is from a human or animal source.
The principle that new cells arise from existing cells is part of cell theory. To arrive at this answer, we can analyze each option:
A. Protein synthesis: While protein synthesis is an important cellular process, it does not directly address the origin of new cells. Thus, this option can be eliminated.
B. An ecosystem: The principle of new cells arising from existing cells is not directly related to the concept of an ecosystem, which focuses on the interactions between organisms and their environment. Therefore, this option can also be eliminated.
C. Cell theory: Cell theory states that all living organisms are composed of cells and that new cells arise from pre-existing cells. This principle directly addresses the question, making it the correct choice.
D. Levels of organization: Although the principle of new cells arising from existing cells is related to the organization of living things, it is not specific to the concept of levels of organization. This option can be eliminated.
Hence, the correct answer is C. Cell theory.