A digestive system involving a tube-within-a-tube is characteristic of Cnidarians

____________________ Indicate whether the statement is true or false.


F, gastrovascular cavity

Biology & Microbiology

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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.

Biology & Microbiology

Radioactivity can destroy cancerous tissue but not healthy tissue

Indicate whether the statement is true or false.

Biology & Microbiology

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.

Biology & Microbiology

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

Biology & Microbiology