Which of these describes two broad groups of interactions environmental scientists study?
a how matter undergoes changes and how we interact with the animals we study
b how we obtain food and how the moon affects the earth
c how humans come together to organize governments and how laws are maintained
d how we use natural resources and how our actions alter the environment

Are substances released into the environment that in excess amounts cause damage

Salmonella typhimurium is a food-borne bacterial pathogen that can cause severe gastrointestinal disease. salmonella is often phagocytosed by macrophages that normally destroy bacterial pathogens, but this bacterium is somehow able to prevent the complete maturation of phagolysosomes. salmonella is able to tolerate the low ph of phagolysosomes, and in fact responds to the drop in ph by secreting toxins that interfere with other cellular responses. which of the following differences would you expect to contribute to the survival of a bacterium within an salmonella-containing phagosome, compared to a healthy phagolysosome? decreased activity of acid hydrolases increased activity of acid hydrolases decreased import of h+ ions increased import of h+ ions my guess is decreased activity of acid hydrolases but i'm not sure.

Afor ram b for pats super bowl pick one