GMO stands for “genetically modified organism”, which is a new organism, not found in nature, created by scientists when they genetically modify or engineer food plants.
adaptations.
Natural selection leads to traits called adaptations, which improve an organisms ability to survive and reproduce.
Answer:
Oxygen levels stay above 15 percent starting 200 million years ago
Explanation:
Atmospheric oxygen levels are related to the evolution on Earth and changes in geochemical cycles that involve climate variations.
The presence of O
2 and evolution of oxygen gave new opportunities to the life on Earth. Oxygen levels in atmosphere have fluctuated between 15% and 35% of atmospheric volume, since the start of the Cambrian period.
So, form the starting 200 million years ago, oxygen level stay above 15 percent and the correct option is "B".
The arrow indicates the movement of energy from one organism to another