These cells do not function as antigen presenting cells (apcs)?
a. macrophages and langerhans cells
b. b cells and langerhans cells
c. b cells and macrophages
d. t cells and cd8 t cells
e. b cells and dendritic cells

Variety of living organisms; includes genetic, species, and ecological types.

Amarine ecologist has constructed the conceptual model shown in the diagram. what predictions can be made from using this model? where the tertiary consumers get their energy how often primary producers are able to reproduce when bacteria and fungi initiate the process of decomposition whether other secondary consumers are present

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)