The true statement about pollination in flowers is:
Bees pollinate flowers when pollen gets stuck to their bodies, then is transferred to the stigma.
This correctly describes the process of how bees contribute to pollination by carrying pollen to the stigma of flowers.
The other statements are not accurate:
- Plants can reproduce asexually as well, so pollen does not necessarily have to move from one flower to another to achieve fertilization.
- The stigma does not hold the ovules; the ovules are found within the ovary of the flower. The stigma is where pollen lands. Fertilization occurs after pollen travels down to the ovules.
- Animals pollinate flowers by interacting with various parts of the flower, but they do not drink nectar from the base of the filaments; they primarily access nectar from the flower’s nectaries.