The X drawn over the flower shows that it did not survive. True The flowers grew longer petals because they needed to attract bees. False The model is comparing two species of flower: a species with short petals and a species with long petals. True The top row of flowers indicates that there were only four flowers in the original population. True Flowers with short petals only mate with other flowers with short petals. False The leaves, stems, and roots of the flowering plants were not included in the model for simplicity. True