Embryonic ectoderm develops into which of the following major tissue types ?

Options

A. Connective and epithelial tissue
B. Epithelial and nervous tissue
C. Connective and muscle tissue
D. Muscle tissue and epithelial tissue

Explanation

To answer the question "Embryonic ectoderm develops into which of the following major tissue types?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Germ Layers**:
- In embryonic development, there are three primary germ layers: ectoderm, mesoderm, and endoderm. These layers are formed during the process of gastrulation.

2. **Identify the Role of Ectoderm**:
- The ectoderm is the outermost layer and is primarily responsible for developing into the nervous system and the epidermis (the outer layer of skin).

3. **Examine the Options**:
- The options provided are:
a) Connective and epithelial tissue
b) Epithelial and nervous tissue
c) Connective and muscular tissues
d) Muscle tissues and epithelial tissues

4. **Analyze Each Option**:
- **Option a**: Connective and epithelial tissue - Incorrect, as connective tissues are derived from mesoderm.
- **Option b**: Epithelial and nervous tissue - Correct, as both epithelial tissues and nervous tissues arise from ectoderm.
- **Option c**: Connective and muscular tissues - Incorrect, as both are derived from mesoderm.
- **Option d**: Muscle tissues and epithelial tissues - Incorrect, as muscle tissues are derived from mesoderm and only some epithelial tissues can arise from ectoderm.

5. **Conclusion**:
- Based on the analysis, the correct answer is **Option b: Epithelial and nervous tissue**.