Mention the ploidy of the following: protonemal cell of a - moss, primary endosperm nucleus in dicot, leaf cell of a moss, prothallus cell of a fern, gemma cell in Marchantia, meristem cell of monocot, ovum of a liverwort and zygote of a fern.

Explanation

To determine the ploidy of various plant cells, we need to understand the number of complete sets of chromosomes present in each cell type. Here’s the step-by-step solution for the given question:

1. **Protonemal cell of a moss**:
- The protonemal stage is the early development stage of mosses.
- **Ploidy**: Haploid (n) - it has one set of chromosomes.

2. **Primary endosperm nucleus in dicot**:
- This nucleus is formed during double fertilization, where two polar nuclei and one sperm nucleus fuse.
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