Watermelon is a dicot plant.

Explanation:
Monocots and dicots:
To understand whether watermelon is a monocot or dicot, it is essential to have a basic understanding of these two categories.

1. Monocots:
Monocots are flowering plants belonging to the class Monocotyledonae. They have various characteristics that distinguish them from dicots, such as:

- Monocots have only one cotyledon, which is the embryonic leaf inside the seed.
- The veins in the leaves of monocots are parallel to each other.
- Monocots have scattered vascular bundles in their stems.
- The flower parts in monocots are usually in multiples of three.
- They lack secondary growth (woody stems).

Some common examples of monocots include grasses, lilies, orchids, and palms.

2. Dicots:
Dicots are flowering plants belonging to the class Dicotyledonae. They encompass a wide range of plant species and possess certain characteristics that differentiate them from monocots:

- Dicots have two cotyledons, which are the embryonic leaves inside the seed.
- The veins in the leaves of dicots are reticulated or branched.
- Dicots exhibit a ring-like arrangement of vascular bundles in their stems.
- The flower parts in dicots are usually in multiples of four or five.
- They can undergo secondary growth, resulting in the development of woody stems.

Watermelon as a dicot:
Now, let's discuss why watermelon is classified as a dicot:

1. Cotyledons:
Watermelon seeds contain two cotyledons, which is a characteristic feature of dicots. This feature distinguishes watermelon from monocots that possess only one cotyledon.

2. Leaf veins:
The veins in watermelon leaves exhibit a reticulated or branching pattern, which is another characteristic feature of dicots. Monocots, on the other hand, have parallel leaf veins.

3. Vascular bundles:
Watermelon stems have a ring-like arrangement of vascular bundles, which is typical of dicots. In contrast, monocots have scattered vascular bundles.

4. Flower parts:
The flower parts of watermelon, including petals, sepals, and stamens, are usually in multiples of four or five, which is a common characteristic of dicots. Monocots typically have flower parts in multiples of three.

Based on these distinguishing features, watermelon is classified as a dicot plant.

In conclusion, watermelon is considered a dicot plant due to its possession of two cotyledons, reticulated leaf veins, ring-like arrangement of vascular bundles, and flower parts in multiples of four or five. These characteristics align with the typical features of dicots, setting watermelon apart from monocots.

Watermelon is a dicot.if we break the seed into two half it is very clear to see that it's seeds are dicotyledons.