Question 5
In maize, the androecium matures before the gynoecium. Which adaptation is this, and how does it prevent self-pollination?
The right answer is the one marked above.
Dichogamy — it separates the two parts in time. Both parts are there, but they are never ripe at once. Maize and Tridax are the examples.
Each of the other three names its own adaptation correctly; they are simply the wrong ones for this description. Five adaptations really amount to three tactics — rule the pollen out, separate the parts in space, or separate them in time.