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Pigments absorb light used in photosynthesis.Set of wavelengths that a pigment doesn't absorb are reflected.

Plants have pigments that are not photosynthetically active because:

  • They reflect wave lengths that are not absorbed during photosynthesis

Photosynthesis is the process of plants converting energy from sunlight and other sources into oxygen which helps in cellular respiration.

The pigment which enables plants to convert energy into food is known as chlorophyll.

One example of a plant pigment that does not play a role in photosynthesis is called anthocyanin. Its job is to give color to the plants.

Therefore, the reason plant pigments are not active in the photosynthesis stage is because they reflect wave lengths and perform other specific functions.

Read more here:

https://brainly.com/qustion/14100696