Answer:
your answer is antibodies reacting to foreign antigens.
Answer:
Ecosystem, Metabolism, Cells, Elements and Functional groups, Macromolecules.
Explanation:
All living things are made up of cells which is the smallest unit of individual organisms. Ecosystem, Metabolism, Cells, Elements and Functional groups, Macromolecules. the foregoing distinguishes living things from non-living.
Answer:
Cell Membrane
Explanation:
The unique structure of the cell membrane allows small substances (like oxygen or carbon dioxide) to easily pass through.
The lower the fossil the older it is.
So, if two fossils were in different layers of sedimentary rock, the lowest fossil is older.
D. Is the answer you are looking for, because the new bacterium is almost always the same as the parent. Answer D. Is not true.