Morphogenesis in plants is controlled by:
(a) Auxins (b) Gibberellins (c) Cytokinins (d) Abscisic acid
Codes:

Options

A. (a), (b) and (c) are correct
B. (a) and (b) are correct
C. (b) and (d) are correct
D. (a) and (c) are correct

Answer

To solve the question regarding which plant hormones control morphogenesis in plants, we will analyze each option provided:

1. **Understanding Morphogenesis**:
- Morphogenesis is the biological process that causes an organism to develop its shape. In plants, this involves cell division and differentiation, leading to the formation of various structures such as roots, stems, and leaves.

2. **Analyzing the Options**:
- **(a) Auxins**:
- Auxins are a class of plant hormones that play a crucial role in the growth and elongation of plant cells. They are primarily involved in stem elongation and the formation of roots. Auxins promote cell division and differentiation, making them significant in morphogenesis.
- **(b) Gibberellins**:
- Gibberellins are another type of plant hormone that primarily influences seed germination and stem elongation. However, their main role is not directly related to morphogenesis but rather to growth processes like breaking dormancy in seeds.
- **(c) Cytokinins**:
- Cytokinins are hormones that promote cell division and differentiation, particularly in the roots and shoots of plants. They are essential for the growth of new tissues, making them important for morphogenesis.
- **(d) Abscisic acid**:
- Abscisic acid is involved in various plant processes, including the regulation of stress responses and the aging of plant tissues. It does not promote morphogenesis; instead, it often inhibits growth.

3. **Conclusion**:
- Based on the analysis, auxins and cytokinins are the hormones that directly control morphogenesis in plants. Gibberellins and abscisic acid do not play a significant role in this process.

4. **Final Answer**:
- The correct answer is **(a) Auxins and (c) Cytokinins**.