Pericarp and petals contain Chromoplast.

Explanation:
Chromoplasts are plastids that are responsible for the synthesis and accumulation of pigments other than chlorophyll. They are found in various plant tissues, including fruits, flowers, and petals. Pericarp is the outermost layer of a fruit that develops from the ovary wall, and petals are the modified leaves of a flower.

Chromoplasts in Pericarp:
The pericarp of fruits often undergoes color changes during ripening, which is due to the accumulation of pigments in chromoplasts. These pigments give fruits their characteristic colors, such as red, orange, and yellow. For example, in tomatoes, the green pericarp turns red during ripening due to the accumulation of red pigments called lycopene in chromoplasts.

Chromoplasts in Petals:
Petals are the colorful part of a flower that attracts pollinators. They contain chromoplasts that synthesize and store pigments responsible for the vibrant colors of flowers. These pigments include carotenoids, anthocyanins, and flavonoids. Carotenoids are responsible for yellow, orange, and red colors, while anthocyanins give flowers shades of red, purple, and blue.

Importance of Chromoplasts:
Chromoplasts play a crucial role in plant biology as they are involved in attracting pollinators, seed dispersal, and fruit ripening. The pigments synthesized in chromoplasts help in attracting insects, birds, and other animals for pollination. They also aid in seed dispersal by attracting animals to consume fruits and disperse the seeds. Additionally, the color changes in pericarp during fruit ripening are essential for seed dispersal and indicate the fruit's readiness for consumption.

In conclusion, chromoplasts are present in both pericarp and petals. They are responsible for the synthesis and accumulation of pigments that give fruits and flowers their vibrant colors. The presence of chromoplasts in these tissues is significant for attracting pollinators, seed dispersal, and indicating fruit ripeness.

Pericarp and petals are colourful. chromoplast is present there