Question

how is cross-pollination carried out in nature? cross-pollination occurs with the help of pollinators, like bees or birds. cross-pollination occurs when pollen is transferred to the stigma of the same flower. cross-pollination does not occur in nature.

Explanation:

• For the second option, transferring pollen to the stigma of the same flower is self - pollination, not cross - pollination.
• For the third option, cross - pollination does occur in nature.
• The first option is correct because pollinators such as bees and birds play a major role in transferring pollen from the anther of one flower to the stigma of another flower, which is cross - pollination.

Answer:

A. Cross - pollination occurs with the help of pollinators, like bees or birds.