Pollinators and seed dispersers are offered reward by plants in form of `ul(A)` and `ul(B)` respectively.

Answer

**Step-by-Step Solution:**

1. **Understanding the Role of Pollinators:**
- Pollinators are organisms that help plants in the process of pollination, which is essential for fertilization and the production of seeds.
- Since plants cannot move, they rely on pollinators to transfer pollen from the male parts (anthers) to the female parts (stigmas) of flowers.

2. **Identifying the Reward for Pollinators:**
- To attract pollinators, plants offer rewards. The most common rewards provided by plants to pollinators are:
- **Pollen:** A protein-rich food source.
- **Nectar:** A sugary liquid that provides energy.
- Therefore, for the blank `ul(A)`, the answer is **pollen and nectar**.

3. **Understanding the Role of Seed Dispersers:**
- Seed dispersers are organisms that help in spreading seeds away from the parent plant. This is crucial for the germination and growth of new plants in different locations.
- Similar to pollination, plants need external agents to transport their seeds to suitable locations for growth.

4. **Identifying the Reward for Seed Dispersers:**
- To attract seed dispersers, plants produce fruits that are often nutritious and appealing. These fruits serve as a reward for animals and birds that consume them.
- The seeds are often excreted or discarded after the fruit is eaten, allowing for dispersal.
- Therefore, for the blank `ul(B)`, the answer is **nutritious and juicy fruits**.

5. **Final Answers:**
- `ul(A)`: Pollen and Nectar
- `ul(B)`: Nutritious and Juicy Fruits