Which among the following plant has diploid endosperm?

Options

A. Betal nut
B. Oenothera
C. Date palm
D. Phoenix

Answer

To determine which plant has a diploid endosperm, we can follow these steps:

### Step 1: Understand the Definition of Endosperm
- The endosperm is a tissue produced in the seeds of flowering plants that provides nutrition to the developing embryo. It is formed from the fusion of one male gamete with two polar nuclei during fertilization.

**Hint:** Remember that endosperm is crucial for seed development and nutrition.

### Step 2: Identify the Typical Ploidy of Endosperm
- In most flowering plants, the endosperm is triploid (3n), which means it has three sets of chromosomes. This is the result of one sperm cell fertilizing the egg cell and another sperm cell fusing with two polar nuclei.

**Hint:** Consider the common ploidy levels of endosperm in flowering plants.

### Step 3: Look for Exceptions
- While triploid endosperm is common, there are exceptions where diploid (2n) endosperm can occur. One such example is found in the plant genus Oenothera.

**Hint:** Focus on known exceptions to the typical triploid endosperm.

### Step 4: Analyze the Given Options
- Review the options provided:
1. Betel nut - has triploid endosperm.
2. Oenothera - known to have diploid endosperm (this is a potential correct answer).
3. Date palm - has triploid endosperm.
4. Phoenix - also has triploid endosperm.

**Hint:** Eliminate options based on the typical ploidy of endosperm.

### Step 5: Conclude the Correct Answer
- Based on the analysis, the only plant from the options that has diploid endosperm is Oenothera.

**Final Answer:** The plant that has diploid endosperm is **Oenothera**.