Atype of white blood cell that engulfs foreign pathogens and activate lymphocytes is a(n)

I believe that the answer would be a phagocyte.

Phagocytes are a type of white blood cell that are found in bone marrow. They protect the body y engulfing foreign particles including pathogens.

I hope this helps! I'm happy to ask any other questions you might have :)

Meristem cells

Explanation:

Meristems are a group of cells which have capacity to divide throughout their life. The cells of meristem are small, thin walled, dense with large nucleus. Vacuoles are either small or absent. The intercellular spaces are absent. These cells undergo mitotic division form undifferentiated cells or the individual cells have distinguishing features. Meristem may be apical, intercalary or lateral.