Fern spores are

Options

A. Haploid
B. Diploid
C. Triploid
D. Tetraploid.

Answer

### Step-by-Step Solution:

1. **Definition of Fern Spores**: Fern spores are reproductive units produced by ferns, which are a type of vascular plant belonging to the group Pteridophyta.

**Hint**: Remember that spores are essential for the reproduction of many plants, including ferns.

2. **Location of Spores**: Fern spores are found in structures called sporangia. These sporangia are often grouped together in clusters known as sori.

**Hint**: Think about where you might find spores on a fern plant. They are typically located on the undersides of leaves.

3. **Structure of Sori**: The sori are usually located on the underside of the fern leaves (fronds). They can appear as small dots or patches.

**Hint**: Visualize a fern leaf and consider where the reproductive structures might be hidden.

4. **Nature of Spores**: The spores produced by ferns are haploid, meaning they contain a single set of chromosomes. This haploid condition arises from the process of meiosis, which occurs in the sporangia.

**Hint**: Recall the difference between haploid and diploid cells, and how meiosis contributes to the formation of haploid spores.

5. **Function of Spores**: The primary function of fern spores is to facilitate reproduction. When conditions are favorable, these spores can germinate and develop into a gametophyte, which is the next stage in the fern life cycle.

**Hint**: Consider the life cycle of ferns and how spores play a crucial role in their reproduction.

### Summary:
Fern spores are haploid reproductive units found in sporangia, grouped in sori on the underside of leaves, and are produced through meiosis. They are essential for the fern's reproductive cycle.