If the cell was a cube and you doubled the height, width, and length of the cell, how much would the volume increase?
A. 9-fold
B. It would stay the same.
C. 8-fold
D. 4-fold
E. 2-fold
C. 8-fold
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Viroids are naked (lacking a protein shell) pieces of DNA that infect plants
Indicate whether this statement is true or false.
In land plants, ________ transports water and minerals from the soil, and ________ transports food created from photosynthesis.
a. xylem; phloem b. xylem; spores c. phloem; xylem d. phloem; gametes
Members of the ancestral salamander species live in northern California. As they migrate southward, populations are separated by the Central Valley. With limited contact between populations on the east and west of the valley, genetic differences accumulate. What type of speciation occurs under these conditions? 
A. sympatric speciation B. allopatric speciation C. Both sympatric and allopatric speciation. D. Neither sympatric or allopatric.
Which type of chemical bond forms between a cation and an anion?
a. nonpolar covalent bond b. polar covalent bond c. ionic bond d. hydrogen bond