In the embryos of a typical dicot and a grass, true homologous structures are

Options

A. coleorhiza and coleoptile
B. coleoptile and scutellum
C. cotyledons and scutellum
D. hypoctoyl and radicle

Answer

To solve the question regarding the true homologous structures in the embryos of a typical dicot and a grass (monocot), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Homologous Structures**:
- Homologous structures are anatomical features in different species that have similar functions but may differ in structure. They arise from a common evolutionary ancestor.

2. **Identifying the Plants**:
- A typical dicot (like a bean plant) has two cotyledons, while a grass (monocot) has one cotyledon known as the scutellum.

3. **Analyzing the Options**:
- The options given are:
a. Solioregia and soliptyl
b. Soliptyl and scutellum
c. Cotyledon and scutellum
d. Hypocotyl and radical

4. **Comparing Structures**:
- **Cotyledon**: In dicots, cotyledons serve as the food storage organs. They are typically two in number.
- **Scutellum**: In monocots, the scutellum serves a similar function as the cotyledon, being the food storage organ but is only one in number.

5. **Conclusion**:
- Although the cotyledon in dicots and the scutellum in monocots differ in structure (number and form), they perform the same function of food storage. Therefore, they are considered homologous structures.

6. **Final Answer**:
- The true homologous structures in the embryos of a typical dicot and a grass are **cotyledon and scutellum**.