The immunological synapse refers to the
A) interaction between a T cell and an antigen-presenting cell to produce a specialized contact area for communication between these cells.
B) activation of a B cell to become a plasma cell.
C) interaction between lymphocytes and foreign antigens to produce memory cells.
D) binding of a monocyte or macrophage to antigen so that it can act as an antigen-presenting cell.
E) interaction of the many cytokines produced by different immunological cells.
A
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a. thalli b. rhizomes c. gametangia d. protonema e. rhizoids
________ are the main cell type within connective tissue in all but one situation
a. Macrophages b. Cuboidal cells c. Fibroblasts d. Collagen fibers e. Squamous cells
Based on the fossil record, which of the following groups evolved about 1.8 million years ago and
made fairly sophisticated tools, including the hand axe?
a. Homo habilis b. Homo erectus c. Australopithecus africanus d. Australopithecus afarensis e. Homo neanderthalensis
This simple plant tissue consists of dead cells
with thick, lignified cell walls that function in support. This plant tissue is
a. parenchyma. b. sclerenchyma. c. collenchyma. d. xylem. e. phloem