An antigen-sensitized B cell or T cell that forms in an immune response and acts immediately is a(n)
O a. lymphocyte
O b. phagocyte
O c. cytokine
O d. leucocyte
O e. effector cell

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

All organisms contribute some water to the water cycle by conducting