Blooms of certain dinoflagellates are associated with all of the following except
A. Pfiesteria piscicida.
B. euglenids.
C. ciguatera.
D. paralytic shellfish poisoning.
E. red tides.
Answer: B
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Which of the following statements concerning the development of a coelom is FALSE?
a. It requires animals to have either two or three tissue layers. b. It requires the endoderm to be covered by mesoderm. c. It occurs in protostomes and deuterostomes. d. It may occur by schizocoely. e. It is a fluid-filled cavity.
Which of the following would not be considered part of the peripheral nervous system?
a. the eyes b. the spinal cord c. afferent neurons d. the ears e. efferent neurons
A patient in the United States complains of severe diarrhea after drinking water on a camping trip. This patient has most likely consumed ________ ________.
What will be an ideal response?
Economies of scale occur in major transitions when:
a. individuals aggregate. b. groups can perform tasks more efficiently than individuals. c. cell type number increases. d. genes become genetically imprinted.