From Seed to Seed: Plant Science for K-8 Educators
G. Sexual Reproduction
Plants, like humans, have finite life spans and must reproduce if their
species are to persist. Reproduction is a driving force for many organisms'
behavior, and plants are no exception. Many plants expend a huge amount
of energy to reproduce. Consider the energy it takes for a plant to produce
large, showy, or complex flowers such as tiger lily, dahlia, or iris-especially
relative to the energy it expends to produce smaller, simpler leaves!