The invertebrate group most closely related to the vertebrates is the

A. Notochordata.
B. Urochordata.
C. Ophiouroidea.
D. Cephalochordata.
E. Echinodermata.


Answer: B

Biology & Microbiology

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The “tunic” of tunicate refers to

a. a body covering. b. the type of food-gathering mechanism. c. muscle arrangements in the larva. d. the immature stage of a true fish. e. organ rotation during reorganization.

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The midrange of an array of phenotypes is favored in 

A. stabilizing selection. B. genetic drift. C. disruptive selection. D. gene flow. E. directional selection.

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Prophages can be activated into viral replication and enter the lytic cycle.

Answer the following statement true (T) or false (F)

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