Endosperm of Pinus is comparable to which structure of angiosperms

Options

A. Endosperm
B. Nucellus
C. Embryo sac
D. None.

Answer

To answer the question regarding the comparison of the endosperm of Pinus with a structure in angiosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Type of Plant**:
- Pinus is classified as a gymnosperm, which means it is a non-flowering plant that produces naked seeds.

2. **Understand the Structure of Pinus**:
- In Pinus, the ovule is located on ovule-bearing scales (female cones). The ovule consists of two main parts: the nucellus and the integument.

3. **Role of Nucellus**:
- The nucellus undergoes meiotic division to form the endosperm, which is crucial for providing nutrition to the developing embryo after fertilization.

4. **Pre-Fertilization Context**:
- Before fertilization, the embryo within the ovule contains cells that form the archegonium, which is the female gametophyte where the egg cells are located.

5. **Identify the Structure in Angiosperms**:
- In angiosperms, the ovule also contains a female gametophyte, which is found in a structure called the embryo sac.

6. **Comparison of Structures**:
- The endosperm of Pinus, which acts as a precursor for the female gametophyte, can be compared to the embryo sac in angiosperms, as both structures are involved in the development of female gametes.

7. **Conclusion**:
- Therefore, the endosperm of Pinus is comparable to the structure of angiosperms known as the embryo sac.

### Final Answer:
The endosperm of Pinus is comparable to the embryo sac of angiosperms.

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