Biology, 26.11.2019 21:31 cookiee1387
Superconducting magnets are used in machines called particle accelerators. these machines rely on zero resistance in order to function properly. how are the magnets able to have zero resistance? they are heated to extremely high temperatures. they are cooled to extremely low temperatures. they are made to be very thick. they are made to be very thin.
Answers: 3
Biology, 21.06.2019 17:00
What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?
Answers: 1
Biology, 21.06.2019 17:10
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.
Answers: 1
Biology, 21.06.2019 20:00
In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls
Answers: 1
Superconducting magnets are used in machines called particle accelerators. these machines rely on ze...
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