Which of the following is NOT a way insect pigments are produced?

• A. By insect metabolism
• B. Sequestering from a plant source
• C. By microbial endosymbionts
• D. By photosynthesis

Answer: (D)

Pigment production in insects comes from three main routes: they can make pigments themselves through their metabolic pathways, they can acquire pigments by sequestering them from the plants they eat, and they can rely on microbial endosymbionts that synthesize pigments or provide pigment precursors. Internally produced pigments include compounds like melanins and pterins formed by the insect’s own enzymes. Sequestration involves taking up plant pigments such as carotenoids during feeding and storing them in tissues, contributing to color. Endosymbionts can also contribute to pigment production by supplying compounds or precursors that the insect uses to build pigments. Photosynthesis is not a way insects produce pigments because they lack chlorophyll-based photosynthetic machinery and do not perform photosynthesis.