Host cells of viruses include A. human and other animals. B. plants and fungi. C. bacteria. D. protozoa and algae. E. All of the choices are correct.

Break Down the Problem

1. Identify the types of organisms that can be infected by viruses.
2. Evaluate each answer choice to determine if they can act as host cells for viruses.

Relevant Concepts

• Viruses are obligate intracellular parasites, meaning they require a host cell to replicate and propagate.
• Different types of organisms can serve as hosts for various viruses, including humans, animals, plants, fungi, bacteria, protozoa, and algae.

Analysis and Detail

1. Humans and Other Animals: Yes, many viruses (e.g., influenza, HIV) infect human and animal cells.
2. Plants and Fungi: Some viruses (e.g., tobacco mosaic virus) specifically infect plants.
3. Bacteria: Bacteriophages are viruses that infect bacteria.
4. Protozoa and Algae: Some viruses can also infect these organisms.

Verify and Summarize

All the listed categories can indeed serve as hosts for different types of viruses. Therefore, since each of the answer choices represents a valid group of host cells for viruses, the correct answer is that all choices are correct.

Final Answer

E. All of the choices are correct.