The right answer for the question that is being asked and shown above is that: "b. Archaeopteryx fossils share traits with both birds and reptiles."
But roughly 2.45 billion years ago, the isotopic ratio of sulfur transformed, indicating that for the first time oxygen was becoming a significant component of Earth's atmosphere, according to a <span>2000 paper in Science</span>. At roughly the same time (and for eons thereafter), oxidized iron began to appear in ancient soils and bands of iron were deposited on the seafloor, a product of reactions with oxygen in the seawater."What it looks like is that oxygen was first produced somewhere around 2.7 billion to 2.8 billon years ago."It looks as if there's a significant time interval between the appearance of oxygen-producing organisms and the actual oxygenation of the atmosphere."
The answer is A because D would be contradictory to your question, B only works if it's out of the water, and C makes no sense. So yeah, A they swim into cooler water. Hope this helps!
Answer:
D. decomposers
Explanation:
primary, secondary consumers and producers all eventually die. Decomposers break the dead organisms down to nitrogen, carbon and other basic elements that can then be used as nutrients for the new plants.
