The sugars in RNA and DNA are ribose and deoxyribose respectively. Which of the following describes the relationship between these two sugars?
A) In deoxyribose the oxygen lost is from the hydroxyl on C-1 of ribose.
B) In deoxyribose the oxygen lost is from the hydroxyl on C-2 of ribose.
C) In deoxyribose the oxygen lost is from the hydroxyl on C-3 of ribose.
D) In deoxyribose the oxygen lost is from the hydroxyl on C-4 of ribose.
B
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The rock type that is the most common setting for caves formed by dissolution of a rock is
A) well-sorted sandstone. B) gray limestone. C) dark porous lava flows. D) gray granite. E) slate.
An evolutionary trend in hoofed animals in which the premolars become more like molars,
giving the animals a continuous series of grinding teeth:a. photosynthesis d. sublimation b. accretion e. molarization c. mitosis
A(n) ____________________ is a thin, horizontal sheet of magma that solidified beneath Earth's surface
Fill in the blank(s) with correct word
The igneous feature shown in this figure is a 
A. dike. B. volcanic neck. C. sill. D. laccolith.