Cells that engulf bacteria or cell debris within loose connective tissue are
a) fibroblasts.
b) macrophages.
c) adipocytes.
d) mast cells.
e) melanocytes.

macrophages

Explanation:

Macrophages are a type of immune cells that function as phagocyte. They are produced by white cells called the monocytes. Upon ingestion of bacterial cells, cytotoxic compounds e.g cytokines are produced that digest the bacteria.

The macrophages are activated by the presence of microbes in the blood. They activate antigen T presenting cells to produce cytokines that further destroy the engulfed bacteria.

oak trees? ? what was listed

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs