Match the molluscan body part to its function.
A. visceral mass
B. foot
C. mantle
D. mantle cavity
A. houses organs
B. movement
C. secretes the shell
D. houses gills
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During which phase of the bacterial growth curve does a bacterial population become much more resistant to harmful conditions?
A. Lag phase B. Exponential phase C. Stationary phase D. Late log phase
The spiral valve is a specialized structure found within:
a. bony fishes. b. sharks. c. sea turtles. d. lampreys. e. sea birds.
Which of the following statements is incorrect regarding DNA and RNA?
A. One of the bases is different. B. DNA is double stranded, and RNA is a single strand. C. They each contain a slightly different sugar molecule. D. All of the above are correct.
Facilitated diffusion across a biological membrane requires ________ and moves a substance ________ its concentration gradient
A) energy... down B) transport proteins... down C) energy and transport proteins... against D) transport proteins... against