Question

which kingdom is known to contain organisms that have cells with no cell walls?
animalia
protista
archaebacteria
eubacteria

Explanation:

To determine the kingdom with organisms having cells without cell walls, we analyze each option:

• Animalia: Animal cells lack cell walls. They have cell membranes instead, which is a key characteristic of animals.
• Protista: Some protists have cell walls (e.g., certain algae), while others don't. So it's not the kingdom known for lacking cell walls universally.
• Archaebacteria: These have cell walls (composed of different materials than eubacteria, but still present).
• Eubacteria: They have cell walls (typically made of peptidoglycan).

So the kingdom with organisms having cells without cell walls is Animalia.

Answer:

A. Animalia