Your unknown bacterial samoe is gram positive produces catalast and produces amylase the most likely identifiacaiton is

Bacillus megaterium

Explanation:

Bacillus megaterium is a bacterium found in diverse habitats. Bacillus megaterium is gram-positive, it means they retain in the thick peptidoglycan cell wall the color of the crystal violet stain. These bacteria produce catalase, which is an enzyme that catalyzes the breakdown of hydrogen peroxide (H2O2) to water and oxygen. Finally, Bacillus megaterium also produces amylase in order to catalyze the hydrolysis of starch into smaller sugar molecules.

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.