Which of the following involves pathogens or an invading viruses or bacteria A- T cell
B- B cell
C- macrophage
D- red blood cell

Macrophage

Explanation: Macrophage is the first line of immune defense against invading pathogens like virus and bacteria.Macrophages kill their prey with acids.

the correct answer is: d. the saltine and pretzel are made of flour, yeast, and baking soda, and salt. the pecan contains no flour but it does contain fats. the pecan is a nut that can be consumed as a healthy snack. first of all, pecans are a source of fat (monounsaturated fat), but they provide less fat than some other nuts. pecans are a rich source of dietary fiber, manganese magnesium, phosphorus, thiamin, vitamin e…

i thinking chemical change