Which of the following organisms are not classified as consumers?
a. Humans
b. Trees
c. Fungi
d. Worms
e. Parasites
The answer is b. Trees
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The cells of visceral smooth muscles function as separate units, independent of neighboring cells.
Answer the following statement(s) true (T) or false (F)
Properties of effective antigens include all of the following except
A. they are large molecules with a minimum molecular weight of 1,000. B. they have molecular complexity. C. they are foreign to the immune system. D. they are cells or large, complex molecules. E. they are large polymers made up of repeating subunits.
In cell-mediated immunity, what happens immediately after the infected cell displays the antigen-MHC complex?
a. A virus invades the cell. b. Specific T cytotoxic cells are activated. c. Effector T cytotoxic cells migrate to the infection site. d. Cytokines are released by T helper cells. e. Enzymes destroy the target cells.
An organism may have different COMMON NAMES that vary from area to area and language to language.
a. true b. false