Question

1. how does the size of a bacterial cell compare with an animal cell?
2. how do bacteria make more of themselves?
3. describe two ways you can prevent the spread of bacteria.
4. why are colds and flus not treated with antibiotics?

Explanation:

1. Bacterial cells are generally much smaller than animal cells. Bacteria are prokaryotes with simple structures, while animal cells are eukaryotes with more complex organelles and larger overall size.
2. Bacteria reproduce by binary - fission, where a single bacterium divides into two identical daughter cells.
3. Hand - washing regularly can remove bacteria from hands to prevent transfer. Also, covering the mouth and nose when coughing or sneezing can prevent the release of bacteria into the air.
4. Colds and flus are caused by viruses. Antibiotics work against bacteria by targeting their cell - wall synthesis, metabolic processes, etc., but have no effect on viruses as viruses have different structures and replication mechanisms.

Answer:

1. Bacterial cells are much smaller than animal cells.
2. By binary - fission.
3. Regular hand - washing; Covering mouth and nose when coughing or sneezing.
4. Because colds and flus are caused by viruses and antibiotics only work against bacteria.