What were the four examples of autotrophic organisms?

Plants, coral, bacteria, and algae do this. Bacteria is a more recent find in the process of photosynthesis with primary producers, as they were just discovered in the soil. During photosynthesis, primary producers take energy from the sun and produce it into energy, sugar, and oxygen.

Explanation:

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"do a testcross with a homozygous recessive plant."