Answer:The Ozone Hole. One billion years ago, early aquatic organisms called blue-green algae began using energy from the Sun to split molecules of H2O and CO2 and recombine them into organic compounds and molecular oxygen (O2). ... As oxygen in the atmosphere increased, CO2 decreased.
<span>The impurities that were removed include sodium hydroxide, ethanol, and the boiling stones.</span>
Answer:
Yes! I think modern whales are different from whales of the past.
Explanation: I think this because past whales didn't have as much worry than pass whales because of the pollution and all of the over fishing going on. Hope this helps, have a gooooooood day!
Explanation:
Unlike asexual reproduction or genetically identical cloning, sexual reproduction involves a sperm and egg and that includes DNA from each parent and since we are humans, we vary and have different traits than another so the baby will inherit some of the parent traits but not all and it makes them unique.
