Look at the list of some types of data that can be use to describe a populated area.

1. Plants and animals in the area
2. Human population density in the area
3. Types of roads in the area
4. Water table levels in the area

Which types of data must be included in a model comparing risks of groundwater pollution of drinking wells in two different watershed areas?

A) 2 & 4 only
B) 1 & 2 only
C) 2 & 3 only
D) 1 & 3 only

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.

Which characteristic should describe all evidence collected by a scientist? true obvious objective subjective

Wich is not standing in the way of astronomers getting a good view of different star