Final answer:
Nucleus, membrane, and lysosome are terms considered to be biology vocabulary because they are specific to the study of cells in the field of biology.
Step-by-step explanation:
The vocabulary terms 'nucleus', 'membrane', and 'lysosome' that are being used in a science lesson on the cell are best categorized as biology vocabulary. This is because they are specific to the biological study of cells, which are the basic structural, functional, and biological units of all known living organisms. Words like these are fundamental to understanding the complex interactions and functions within cells, which is a central topic in biology.