What kingdom does an organism belong to that is an autotroph, unicellular, has cell walls, and reproduces asexually?

The organism described belongs to the kingdom "Protista".

Based on the given characteristics, the organism belongs to the Kingdom Fungi.

To determine the kingdom that an organism belongs to based on the given characteristics (autotroph, unicellular, has cell walls, and reproduces asexually), you can use the following steps:

1. Start by considering the characteristic of being an autotroph, which means the organism is capable of producing its own food through photosynthesis or some other form of self-nourishment.

2. Next, consider the characteristic of being unicellular, meaning the organism is made up of a single cell rather than being multicellular.

3. Then, consider the presence of cell walls, a rigid structure that surrounds the cell membrane and provides support and protection.

4. Finally, consider the method of reproduction—specifically, asexual reproduction, which involves the production of offspring without the involvement of gametes (sex cells) or the fusion of genetic material.

Based on these characteristics, the organism you described belongs to the kingdom Protista. The kingdom Protista is a diverse group that includes various unicellular eukaryotic organisms, such as algae and protozoans. Many protists are autotrophic, have cell walls, and reproduce asexually.

It's important to note that this identification is based on the given characteristics alone, and further information about the specific organism would be required for a more precise identification within the kingdom Protista.