Answer:
A patient who can produce antibodies against some bacterial pathogens, but not against viral infections, probably has a disorder in his, B cells.
a) B cells
In the example that a bread says it is vegan on the packaging that would mean that there is no animal products such as meat, dairy, or eggs. In the example that someone says that they are vegan that means they eat no animal products at all. This could be for a diet, health reasons, or maybe they just don't want to eat animal products.
I hope the last word to be *except
B. Increased stress
Game such as frogs are useful for prey. The bigger animals such as let's say foxes will at them- and so the food chain goes on.
