A closed circulatory system is found in the:A
Cephalopoda.
B. Turbellaria.
C. Bivalvia.
D. Gastropoda.
E. Polyplacophora
A
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Allopatric speciation requires
a. gradual evolutionary changes. b. geographic isolation. c. polyploidy. d. adaptive radiation. e. rapid evolutionary change.
Which organisms are NOT eukaryotes?
a. fungi b. bacteria c. plants d. animals e. protists
__________ selection favors intermediate forms of a
trait where __________ selection favors extreme forms. Fill in the blank(s) with the appropriate word(s).
Whether a cell lives or dies after a particular event depends to a large degree on ________ between ________ and _________ signals.
a) the balance, mitotic, cytokinetic b) the balance, proapoptotic, antiapoptotic c) the differences, on, off d) the differences, mitotic, cytokinetic e) the similarities, proapoptotic, antiapoptotic