Cell membranes are structured so that molecules can pass in and out of the cell across them. while both plant and animal cells have membranes, plant cells also have cell walls surrounding their cells. which of the following observations best supports the conclusion that molecules can cross cell walls as well?
a. every cell has its own nucleus
b. the chloroplasts would need light in order to work
c. the cell wall is directly outside of the cell membrane
d. water in the soil is used in photosynthesis

How would you take a difficult subject matter - such as poaching, deforestation, or climate change and communicate it in a kid-friendly way

Secondary pollutants are more harmful than primary pollutants. select the best answer from the choices provided ot of

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.