A protist that is a heterotroph and has chlorophyll.
The theory is most likely A) Valid. If a group of authorized scientists agreed on the theory, it would be valid. It would most likely be unreliable if it was only one scientist working alone and biased. If you don't have a group of scientists, the theory most likely won't be true because it hasn't been tested many times.
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Your answer is carbon dioxide because Chlorophyll can make food the plant can use from carbon dioxide, water, nutrients, and energy from sunlight. ... During the process of photosynthesis, plants release oxygen into the air.
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Organism in an eniornment can compte for food
