Protists exhibit a diverse range of characteristics, and whether they have cell walls varies among different groups. Some protists, such as algae, do have cell walls composed primarily of cellulose, similar to plants. These cell walls provide structure and protection, allowing algae to thrive in various aquatic environments.
On the other hand, many protozoa, which are also classified as protists, do not possess cell walls. Instead, they have flexible membranes that allow for movement and the ingestion of food particles. This flexibility is crucial for their survival as they navigate through their environments.
In summary, while some protists have cell walls, particularly those in the algae group, others do not, showcasing the remarkable diversity within the kingdom Protista.