Excluding humans, which group of organisms is most likely to change the abiotic factors within an ecosystem?
A. producers
B. detritivores
C. herbivores
D. None of these can change the abiotic factors within an ecosystem.
E. All of these can change the abiotic factors within an ecosystem.
Answer: E
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Monoclonal antibodies obtained from a hybridoma provide
A. a large amount of an antibody that is specific for a particular epitope. B. a single antibody that recognizes many epitopes. C. many epitopes that recognize a specific antibody. D. a large number of B cells.
The cell line HeLa was isolated from a
a. chimpanzee. b. rat. c. human. d. guinea pig. e. dog.
Which of the following statements concerning intracellular receptors is FALSE?
a. Their ligands are hydrophobic. b. Most are transcription factors. c. Some are located in the cytosol. d. After binding their ligand, they move out of the cell. e. Some are bound to DNA.
Palivizumab is used to treat respiratory syncytial virus disease. This antiviral drug is a(n)
A) toxoid. B) monoclonal antibody. C) vaccine. D) immunosuppressive. E) nucleoside analog.