How are the different compounds found in crude oil separated during the refining process? A. They are distilled and separated according to their boiling points. B. They are separated using oil filters. C. Each layer is siphoned off separately from the underground reservoir. D. They are separated visually by their different colors.​

2positives of biotechnology: 1. plants have become more resistant to viruses and other communicable pests.2. with the of biotechnology, we have been able to produce better tasting fruits as well as vegetables.2 negatives of biotechnology: 1. biotechnology poses a number of environmental threats. genetically modifies crops often infect monarch butterflies and other insect species.2. viruses could combine with crops.

The correct answer should be "electrons orbit the nucleus in circular motions exactly as shown on the classic bohr model."