Animals are also involved in the distribution of seeds. Fruit, which is formed by the enlargement of flower parts, is frequently a seed-dispersal tool that attracts animals to eat or otherwise disturb it, incidentally scattering the seeds it contains (see frugivory). Although many such mutualistic relationships remain too fragile to survive competition and to spread widely, flowering proved to be an unusually effective means of reproduction, spreading (whatever its origin) to become the dominant form of land plant life. COUNT 5
QSN1 What are animals also a part of? ANS1 distribution of seeds QSN2 What did the enlargement of flower parts evolve to form? ANS2 Fruit QSN3 What does a plant get out of forming fruit? ANS3 seed-dispersal QSN4 What are many mutualistic relationships, thus failing to survive competition?  ANS4 fragile QSN5 What turned out to be unusually effective for plants to reproduce? ANS5 flowering