Most members of the lineage ____ are terrestrial earthworms
a. Hirudinea
b. Polychaeta
c. Monogenoidea
d. Cestoda
e. Oligochaeta
E
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Which type of microscope shows cells against a white background?
A. Confocal B. Electron C. Fluorescence D. Bright-field E. Phase-contrast
Ricin is toxic because
a. it binds to eukaryotic DNA. b. it binds to eukaryotic mRNA. c. it blocks food from entering the cell. d. it inactivates ribosomes. e. it binds to nerve tissue and causes paralysis.
Many viruses enter cells through receptor mediated endocytosis. Which of the following strategies could be affective in blocking entry of this class of viruses into cells and could be used to treat viral infections?
A.) increase the activity of clathrin B.) block the actin filaments C.) block the receptor with the antibody D.) block the function of adaptin
Why are cases of food borne illnesses escalating in the United States despite our knowledge of how to prevent outbreaks?
What will be an ideal response?