Which of the following is not an example of artificial selection? Group of answer choices different types of tomatoes; roma, beefsteak, grape, cherry, etc. different varieties of roses; yellow, pink, red, thornless, climbing, etc. different styles of potatoes; fried, mashed, baked, etc. different breeds of dogs; poodle, basset hound, Chihuahua, Great Dane, etc. different breeds of cats; Siamese, Persian, Himalayan, American shorthair, etc.

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.

Select the correct answer. which term do biologists use to describe the average number of individuals of a species per unit area? a. carrying capacity b. population density c. minimal viable population d. survivability curve

Match each symbol with its description.