Uring her pregnancy, lorraine has been extra careful to avoid foods that could potentially cause foodborne illness. even though she loves greek salad, at lunch today she had to order something else because the waiter could not confirm whether or not the feta cheese on the salad was pasteurized. pregnant women should avoid unpasteurized cheese because can cross the placental barrier, infect the fetus, and cause spontaneous ab

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Which of these internal feedback reactions does not need your brain? oa. your leg jumping when it is hit by a reflex hammer b. your deeper breathing when you need more oxygen c. your body temperature rising when you have an infection d. your heart beating faster when you are in danger

The system breaks down the food we eat, while the system transports the tiny food particles to each cell in the body. a. muscular; circulatory b. digestive; respiratory c. circulatory; digestive d. digestive; circulatory