1. Evolution
According to their hypothesis, energy such as radiation, cosmic rays, lighting, and heat from volcanic eruptions, reacted with the atmosphere to make the first organic compounds. ... Then life evolved further to make a complex organic soup. ... These heterotrophs took in organic compounds as food and kept multiplying. Eventually their food source of organic compounds ran low so they had to come up with another source of energy thus the autotroph emerged. ... The heterotrophs had been using oxygen for their respiration, the oxygen, like the organic compounds started to run low so there need...
- Word Count: 863
- Approx Pages: 3
- Grade Level: High School