The response to touch by such plants as the sensitive plant is due to:
A. changes in water content of cells
B. changes in electrical impulses at the touched area
C. auxin displacement in the touched area
D. effect of gibberellins on the area affected
E. sensitive responder cells
A. changes in water content of cells
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Immune complexes
A. consist of antigen-antibody bound together. B. are usually cleared rapidly from the body. C. bind to Fc receptors on cells. D. are involved in type III hypersensitivity reactions. E. All of the choices are correct.
Archaeans include three main groups:__________ (methane producers), __________ (salt lovers), and
__________ (heat lovers). Fill in the blank(s) with the appropriate word(s).
Animals with the kind of body cavity that forms between the endoderm and mesoderm, such as nematodes, are called
A. semicoelomates. B. acoelomates. C. pseudocoelomates. D. coelomates.
Negatively charged subatomic particles that have almost no mass are called
A. polymers. B. neutrons. C. ions. D. electrons. E. protons.