_____ pollination can take place in both unisexual and bisexual flowers.

Explanation

**Step-by-Step Solution:**

1. **Understanding Pollination Types**: Pollination can be classified into two main types: self-pollination and cross-pollination. Self-pollination occurs when pollen from the anther of a flower fertilizes the stigma of the same flower or another flower on the same plant. Cross-pollination, on the other hand, involves the transfer of pollen from the anther of one flower to the stigma of a flower on a different plant of the same species.

2. **Identifying Flower Types**: Flowers can be classified as unisexual or bisexual. Unisexual flowers contain either male (staminate) or female (pistillate) reproductive organs, while bisexual flowers contain both male and female reproductive organs.

3. **Cross-Pollination in Unisexual Flowers**: In unisexual flowers, cross-pollination occurs when pollen from the male flower (staminate) is transferred to the female flower (pistillate) of a different plant. This is essential for fertilization and the production of seeds.

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