Which of these is the BEST way to assure a healthy animal stays healthy? A) Enlist the help of an ethologist to observe its behavior
B) Breed it frequently
C) Proper nutrition
D) All of the above

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.

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

This is a scaffolding of protein fibers that us sell keep it shape in a cell division and cell movement