A digestive system involving a tube-within-a-tube is characteristic of Cnidarians
____________________ Indicate whether the statement is true or false.
F, gastrovascular cavity
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The model that assumes that evolution proceeds with slow successive change in a given evolutionary line is referred to as
A. successive descent model. B. punctuated equilibrium. C. gradualism. D. the allopatric model. E. the sympatric model.
Radioactivity can destroy cancerous tissue but not healthy tissue
Indicate whether the statement is true or false.
Blight-resistant crop rice has been tested and found to be nutritionally equivalent to the nongenetically
modified crop rice.
Indicate whether the statement is true or false.In 2000, 87% of the wild rat populations in Stadtlohn, Germany was resistant to the poison bromadiolone. This
indicates that ____was/were commonly used as a rat poison(s) here, and the rat's resistance is an example of ____ selection.
a. warfarin; directional b. bromadiolone; directional c. both warfarin and bromadiolone; disruptive d. neither warfarin nor bromadiolone; stabilizing e. bromadiolone; disruptive