Heterotrophic organisms require nitrogen and carbon for nutrition.The reason is primarliy based on the theory primordial soup. It also have a lot to do with organic compounds.
There are some differences, though. Mammals have hair all over their bodies, while reptiles have scales. Mammals have live births and produce milk for their young, while reptiles lay eggs. Reptiles have only three-chambered hearts, mammals have four
The chronic long term use of alcohol
Answer: The sun
Explanation: Primary producers obtain their energy via the sun through the process of photosynthesis.
Answer:
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