Estalishment of polarity (anterior/posterior,dersal/ventral, medial/lateral) is called

Options

A. Organizer phenomena
B. Axis formation
C. Anamorphosis
D. Pattern formation

Answer

To solve the question regarding the establishment of polarity (anterior/posterior, dorsal/ventral, medial/lateral), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Polarity in Embryos**:
- Polarity refers to the spatial differences in the structure and function of cells in an embryo. It is crucial for the proper development of the organism.
- The terms anterior/posterior, dorsal/ventral, and medial/lateral describe different axes along which the embryo develops.

**Hint**: Remember that polarity is essential for defining the body plan of an organism.

2. **Identifying the Options**:
- The options provided are:
- A) Organizer phenomena
- B) Axis formation
- C) Anamorphosis
- D) Pattern formation

**Hint**: Look for terms that relate specifically to the establishment of spatial orientation in embryonic development.

3. **Analyzing Each Option**:
- **A) Organizer phenomena**: This refers to specific cells that can influence the fate and morphogenesis of surrounding cells, guiding the development of structures along the axes.
- **B) Axis formation**: This is the process of establishing the axes (dorsal-ventral, anterior-posterior) but does not specifically refer to the cells that influence this process.
- **C) Anamorphosis**: This term is related to post-embryonic development and does not pertain to the establishment of polarity.
- **D) Pattern formation**: This involves the spatial arrangement of cells but is more about the final arrangement rather than the initial establishment of polarity.

**Hint**: Focus on which term directly relates to the ability of certain cells to dictate the orientation and structure of the developing embryo.

4. **Selecting the Correct Answer**:
- Based on the analysis, the correct answer is **A) Organizer phenomena**. This term specifically describes the ability of certain cells to establish polarity and influence the development of the embryo along the various axes.

**Hint**: Consider how organizer cells play a crucial role in embryonic development by establishing polarity.

### Final Answer:
The establishment of polarity (anterior/posterior, dorsal/ventral, medial/lateral) is called **Organizer phenomena**.