Fill in the blanks to complete the following sentences. each term may be used more than once. in a circular bacterial chromosome, the structure of dna is a double helix. if dna is twisted in the direction, it becomes overwound. overwinding results in supercoiling. if dna is twisted in the direction, it becomes underwound. underwinding results in supercoiling. one effect of supercoiling in bacterial chromosomes is to promote separation of the two strands of dna in the double helix. positive negative left-handed right-handed

Drag each tile to the correct location. match each trait that an organism displays to a reproductive strategy.

Phosgene is a chemical agent that is formed by decomposition of chlorinated hydrocarbon solvents by ultraviolet radiation. a. false b. true

What evidence could be used to convince policy makers to change a shipping lane from going through a whale breeding ground? information on the number of all whale species currently alive information on the number of all whales hit by boats in the given area information on the number of whale deaths in the world's oceans information on the number of whale offspring born every year. (a) scientists could collect and combine data on fish populations all around the world to show that their populations are declining. (b) scientists collect and combine data on fish populations all around the world to show that their populations are increasing. (c) scientists work together and use past data to show that fish populations are becoming locally extinct in some areas. (d) scientists work together and use past data to show that some fish populations are adapting to environmental changes.