The flower _____ have color and a pleasant fragrance.

filament
petals
stamen
pistil
nectar

petals

A flower has _____ that contains sucrose.

nectar
petals
filament
pistil
stamen

nectar

To determine which word best completes the sentence, we need to understand the parts of a flower and what they contribute to its appearance and smell.

1. Filament: The filament is a thin stalk that holds the anther, where pollen is produced. It does not directly contribute to a flower's color or fragrance.

2. Petals: Petals are the colorful, leaf-like structures that surround the reproductive parts of the flower. They are usually the most visible and attractive part of the flower, and they often produce a pleasant fragrance through specialized cells or glands. Therefore, petals can have both color and a pleasant fragrance.

3. Stamen: The stamen is the male reproductive organ of a flower, consisting of the filament and anther. It mainly produces pollen and does not have color or fragrance.

4. Pistil: The pistil is the female reproductive organ of a flower, consisting of the stigma, style, and ovary. Like the stamen, it does not have color or fragrance.

5. Nectar: Nectar is a sweet liquid produced by flowers to attract pollinators like bees, butterflies, or birds. It is not a structural component of the flower and does not have color or fragrance itself.

Based on this information, the word that best fits the sentence is "petals." Petals are the part of a flower that usually have both color and a pleasant fragrance.