Cottonwood, aspen, and willow trees have drab- coloured flowers with no petals that appear before the tree's leaves are out in the spring; they are dioecious. What does that indicate about these trees?
A) Their pollen is dispersed by wind. B) Early spring birds are probably the pollinators. C) Their insect pollinators are probably colour blind. D) Flower colour or shape is not related to pollinators.
While looking at a flower in your garden, you notice that it has carpels with very long styles and stamens with very short filaments. This plant is most likely to reproduce by