These kindergartners are playing with a parachute in gym class. As the children shake the parachute, it ripples toward the center, moving up and down as the energy moves forward. One child exclaims, "Out parachute is making waves just like our voices!" Is the child correct or incorrect in saying that the parachute waves are just like sound waves? Why?

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.

This is so important ugh its 25 points

Which of the following is a common response to cell signaling?