Answer:
<h2>Billions</h2>
But Talking about our solar system, we've 8 Planets
The force exerted on the blood vessels by the blood is called the blood pressure
Answer:The answer is tiny organisms known as cyanobacteria, or blue-green algae.
Explanation:
These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and oxygen increase. Additionally, some sources you could use that I used to answer this question was
https://www.scientificamerican.com/article/origin-of-oxygen-in-atmosphere/
It's probably C. Because it makes the most sense and photosynthesis doesn't make ATP and if you don't think C. Is the answer then put D.
The answer is Carbon Dioxide. Oxygen is created during photosythesis. :)