Respuesta :

Humans need a digestive system to do cellular respiration, which produces energy used for growth and movement.

Plants do not need one as they make their own energy through photosynthesis. The process produces glucose, which is a form of energy for the plants.

Answer:

Venus fly traps, pitcher plants, and sundews all consume insects, but thats not how they get their energy. They still get their energy from the sun and transform it into food (such as sugars) using photosynthesis. They use the dead insects for their nutrients. ... So a Venus fly trap takes in CO2 from the air.

Explanation:

self explanatory.

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