<human>: Question: Why are a heteromorphic flower's carpels and stamens different lengths?
Answer: While the majority of flowers are perfect or hermaphrodite (having both pollen and ovule producing parts in the same flower structure), flowering plants have developed numerous morphological and physiological mechanisms to reduce or prevent self-fertilization.
 Is the question answered in a satisfactory fashion?

OPTIONS:
- yes
- no
<bot>: no