"The earliest evidence of life on Earth comes from fossils discovered in Western Australia that date back to about 3.5 billion years ago. These fossils are of structures known as stromatolites, which are, in many cases, formed by the growth of layer upon layer of single-celled microbes, such as cyanobacteria. (Stromatolites are also made by present-day microbes, not just prehistoric ones.)
The earliest fossils of microbes themselves, rather than just their by-products, preserve the remains of what scientists think are sulfur-metabolizing bacteria. The fossils also come from Australia and date to about 3.4 billion years ago
Bacteria are relatively complex, suggesting that life probably began a good deal earlier than 3.5 billion years ago. However, the lack of earlier fossil evidence makes pinpointing the time of life’s origin difficult (if not impossible)."
(credit: https://www.khanacademy.org/science/biology/history-of-life-on-earth/history-life-on-earth/a/hypotheses-about-the-origins-of-life)
<u>and for the love of god please change that profile picture</u>
Answer:
d is the answer because it makes the most sense
Explanation:
also because what it says is true everything it says
Answer:
Both organs exchange oxygen and carbon dioxide.
Explanation:
This is because the plant leaf exchange gases during photosynthesis where it uses carbondioxide and water in the presence of light energy and chlorophyll to produce carbohydrates and oxygen. Therefore oxygen is given out to the atmosphere and carbondioxide is taken in.
The lungs also is an organ of respiration, it is where exchange of gases take place where oxygen is taken in through breathing and carbondioxide is given out as by product.
