Bougainvillea flower has

1. Large sepals
2. Large nectary
3. Large colourful petals
4. Large colourful bracts

A flower is said to be complete when:

1. It has the corolla and calyx
2. It has the corolla and gynoecium
3. It has the androecium and gynoecium
4. It has all the four whorls

The part of the flower that gives rise to the seed is

1. Ovary
2. Placenta
3. Ovule
4. Pollen grain

The essential whorls of the flower are the

1. Calyx and Corolla
2. Stamen and ovary
3. Calyx and epicalyx
4. Androecium and gynoecium