Context: 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. Heteromorphic flowers have short carpels and long stamens, or vice versa, so animal pollinators cannot easily transfer pollen to the pistil (receptive part of the carpel). Homomorphic flowers may employ a biochemical (physiological) mechanism called self-incompatibility to discriminate between self and non-self pollen grains. In other species, the male and female parts are morphologically separated, developing on different flowers.

Question: What sexual feature do a majority of flowers demonstrate?
Answer: hermaphrodite

Question: Why did flowering plants develop numerous morphological and physiological mechanisms?
Answer: reduce or prevent self-fertilization

Question: Why are a heteromorphic flower's carpels and stamens different lengths?
Answer: so animal pollinators cannot easily transfer pollen to the pistil

Question: What type of mechanism might homomorphic flowers use to tell the difference between foreign and self pollen grains?
Answer: biochemical

Question: How are some male and female parts separated for some species?
Answer: different flowers

Question: What feature do a majority of biochemical mechanisms have?
Answer: Unanswerable

Question: What do hermaphrodite flowers use to discriminate between self and non-self pollination?
Answer: Unanswerable

Question: What happens to male and female parts of carpels that are hermaphrodites?
Answer: Unanswerable

Question: Why did long stamens develop numerous morphological and physiological mechanisms?
Answer: Unanswerable

Question: What do homomorphic flowers have to make it harder to be pollinated by animals?
Answer: Unanswerable