Mention the ploidy of the following:
prothallus cell of a fern

Explanation

To determine the ploidy of the prothallus cell of a fern, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the term "ploidy":**
- Ploidy refers to the number of sets of homologous chromosomes in a cell. It indicates whether a cell is haploid (one set of chromosomes) or diploid (two sets of chromosomes).

2. **Identify the type of plant:**
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