The correct answer for the question that is being presented above is this one: "oxygen became available from cyanobacteria." About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because oxygen became available from cyanobacteria.
Answer:
it would be option c. X = erosion and deposition; Y = weathering and erosion
Explanation:
Answer:
The situation of a city is the most important factor for its future and whether it grows into a large city or stays a small town. As cities grow and develop, the predominance of these factors that make up their situation will determine whether or not the city will prosper in the long run or decline and become a victim to urban decay. Can i get brainliest
Explanation:
Radiometric dating is dating a rock or mineral by measuring the proportions of an original radioactive material and its decay products. We need to know the rate at which radioactive decay occurs and <span>how much radioactive decay has occurred. Hope this answers the question. Have a nice day.</span>
