1. rain, snow, sleet, and hail are all examples of
a. evaporation
b. condensation
c. precipitation
d. deposition
2. which of the following can change from one state of matter to another at the temperatures and pressures experienced at earth's surface?
a. nitrogen
b. oxygen
c. water
d. carbon dioxide
3. which term describes the conversion of a solid directly to a gas, without passing through the liquid state?
a: evaporation
b. sublimation
c. condensation
d. deposition

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 which case would a scientist choose to use a dissecting microscope rather than a compound microscope

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly