Nitrogenous base pairs would form the rungs of the ladder.
Answer:
A. The use of only the most productive breeds improves genetic diversity.
Answer:Rabbits impact our national parks and reserves by: reducing the regeneration of native plants, through grazing and ringbarking of saplings. competing with native animals for food and shelter. damaging historic and cultural sites, through soil erosion caused by over grazing.Jul 27, 2018
Explanation:
"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>
