Bacteria and Viruses. 7th Grade Science Worksheets and Answer key ... - Free Printable

1. The image displays a diagram of a bacterium, labeling its key structural components such as the cell wall, plasma membrane, cytoplasm, ribosomes, nucleoid (DNA), flagellum, and pili.
2. It explains that bacteria are prokaryotes, lacking a nucleus and membrane-bound organelles, and reproduce via binary fission.
3. The text highlights that while some bacteria cause disease, many are beneficial, aiding in digestion, producing food (like yogurt and cheese), and decomposing organic matter.
4. The diagram also shows different bacterial shapes: rod-shaped (bacillus), spiral (spirillum), and spherical (coccus).