Please choose the statement that describes the basic difference between Type 3 hypersensitivity reactions and the other types of hypersensitivities.
A) Type 3 hypersensitivity reactions are also referred to as anaphylaxis.
B) Type 3 hypersensitivity reactions are largely caused by IgE antibodies.
C) Type 3 hypersensitivity reactions occur in response to soluble, not cell-associated antigens.
D) Type 3 hypersensitivity reactions usually involve the response of cytotoxic T cells.
E) Type 3 hypersensitivity reactions often result in extensive hemolysis.
C) Type 3 hypersensitivity reactions occur in response to soluble, not cell-associated antigens.
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A biological safety cabinet filters out more microorganisms than an N95 mask.
Answer the following statement true (T) or false (F)
The convergence in external morphology of
sharks, penguins, and porpoises is attributed to a. reduced genetic variability in these groups. b. selection pressures that are common to these groups. c. reproductive isolation of these groups. d. identical genes in all three groups. e. use and disuse of the limbs
Crossing over during prophase I results in ________
A) nondisjunction B) reciprocal translocation C) duplication D) genetic recombination
The common name for "cat" in Spanish is "gato" and in Chinese is "mao." Which of the following statements pertaining to the use of scientific names instead of common names is FALSE?
(a). Common names may include different sets of organisms. (b). Scientific names can be known and recognized by all scientists throughout the world. (c). To recognize an organism in the literature by its common name, a scientist would have to know multiple languages. (d). The scientific name begins to tie the organism into related groups. (e). The common name clearly identifies an organism as unique.