in an important experiment with e. coli, meselson and stahl established that during dna replication, each of the two strands that make up the double helix were used as a template for the new strands of dna. the scientists described the replication method as semi-conservative. what does this indicate?

Give an example of the type and scale of economic activity for a traditional economy.

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.

What is 7/81 as a percentage? round your answer to the nearest tenth of a percent.