Name the plant hormones which are involved in growth promoting activities such as cell division, cell enlargement, pattern formation, tropic growth, flowering, fruiting and seed formation.

Answer

### Step-by-Step Solution:

1. **Identify the Growth-Promoting Activities**: The question asks for plant hormones involved in various growth-promoting activities such as cell division, cell enlargement, pattern formation, tropic growth, flowering, fruiting, and seed formation.

2. **List the Relevant Plant Hormones**:
- **Cytokinins**: These hormones are primarily responsible for cell division in plants. The name "cytokinin" itself indicates its role (cyto- meaning cell and -kinin meaning division).

- **Auxins**: Auxins are crucial for cell enlargement, pattern formation, and tropic growth. They help in the overall growth of the plant and influence processes such as phototropism (growth towards light) and gravitropism (growth in response to gravity).

- **Florigen**: Although not fully characterized, florigen is believed to be a hormone that induces flowering. It is thought to be produced in the apical meristems of plants.

- **Ethylene**: This hormone is responsible for fruit ripening and senescence (aging) of plant tissues. It plays a significant role in the process of fruiting.

- **Gibberellins**: Gibberellins are essential for seed germination and the development of shoots. They promote growth and are involved in various developmental processes.

3. **Summarize the Roles of Each Hormone**:
- **Cytokinins**: Promote cell division.
- **Auxins**: Facilitate cell enlargement, pattern formation, and tropic growth.
- **Florigen**: Induces flowering.
- **Ethylene**: Responsible for fruiting and senescence.
- **Gibberellins**: Aid in seed formation and germination.

### Final Answer:
The plant hormones involved in growth-promoting activities include:
- **Cytokinins** (cell division)
- **Auxins** (cell enlargement, pattern formation, tropic growth)
- **Florigen** (flowering)
- **Ethylene** (fruiting)
- **Gibberellins** (seed formation and germination)

---