Why pitcher plants feed on insects despite being green and carrying out photosynthesis?
Pitcher plants are a fascinating group of carnivorous plants that have evolved to supplement their nutrient intake by trapping and digesting insects. Despite being green and capable of photosynthesis, pitcher plants have adapted to grow in nutrient-poor environments where they may not have access to sufficient nutrients like nitrogen and phosphorus.

Adaptations for nutrient acquisition:
- Pitcher-shaped leaves: The pitcher plant's leaves are modified into a pitcher-like structure that acts as a pitfall trap for insects. The shape of the pitcher and its slippery surface make it difficult for insects to escape once they fall in.
- Attractive scent and color: Pitcher plants produce nectar and emit a scent that lures insects towards them. The colorful markings on the pitchers also serve as visual cues for insects.
- Digestive enzymes: Once an insect is trapped in the pitcher, the plant secretes digestive enzymes that break down the insect's body into nutrients that can be absorbed by the plant.
- Nutrient uptake: The nutrients obtained from the digested insects supplement the plant's diet and help it thrive in nutrient-deficient soils.

Benefits of carnivory for pitcher plants:
- Survival in nutrient-poor habitats: By capturing and digesting insects, pitcher plants can obtain essential nutrients that are lacking in their environment.
- Increased reproductive success: The additional nutrients gained from feeding on insects can enhance the plant's growth and reproductive success, leading to more robust offspring.
In conclusion, pitcher plants have evolved to feed on insects as a way to supplement their nutrient intake in nutrient-poor environments. Despite being capable of photosynthesis, carnivory provides pitcher plants with a competitive advantage for survival and reproduction.