Scientists disagree about whether paper bags or plastic bags are less harmful to the environment. which fact supports the use of plastic bags instead of paper bags? a. plastic trash causes the deaths of more than 100,000 birds and other animals each year. b. people recycle 20% of their paper bags but only 1% of their plastic bags. c. it takes thousands more years to break down plastic than it takes to break down paper. d. twenty times more water is used in making a paper bag than in making a plastic bag.

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?

What are two examples of conduction that we use everyday

The arrows indicate the direction of wind flow. which place experiences monsoons?