Carbohydrates and fats are considered high-energy foods because they _____
A) have a lot of oxygen atoms.
B) have no nitrogen in their makeup.
C) have a lot of electrons associated with hydrogen.
D) are easily reduced.
C
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The geological timescale was first developed using the fossil record, but this provided only a system of relative dating; absolute dates weren't established until the discovery of ____
Fill in the blank with the appropriate word.
Do the two DNA double helices following DNA replication have the same, or a different, composition?
a. different b. same
Cell signaling during much of C. elegans development occurs along concentration gradients. What kind of signaling does this represent?
What will be an ideal response?
When gene mutations cause tumor suppressor genes to turn off, cell growth is
a) apoptosis increases b) uncontrolled and cells proliferate c) doesn't change d) suppressed more