Sự di truyền nhóm máu được quy định bởi 3 gen: IA quy định nhóm máu A, IB quy định nhóm máu B, IO quy định nhóm máu O. Gen IA và IB tương đương nhau và trội hoàn toàn so với IO. Ở nhà hộ sinh người ta nhầm lẫn giữa 2 đứa bé , biết rằng ba, mẹ của 1 đứa bé này có nhóm máu O và A, cha mẹ của đứa bé kia có nhóm máu A và nhóm máu AB. Hai đứa bé có nhóm máu O và A. Hãy xác định đứa bé nào là con của cặp vợ chồng nào

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.

What best describes the dropping height of a ball that bounces back up to a height of 45 cm

Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.