If we had three different heights of giraffes in an area, and all the lower trees(food sources) were destroyed in a fire, what would happen to the giraffe population? 1. rapid evolution to taller giraffes

2. shorter giraffes would learn to jump

3. there would be no change

4. a slower than average evolution to the medium height

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.

The energy needs of a human population are not affected by

Explain the significance of thesaurus geographicus