Nitrogen-containing bases between two complementary DNA strands are joined by
a. polar covalent bonds.
b. hydrogen bonds.
c. phosphate groups.
d. deoxyribose sugars.
a
Biology & Microbiology
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What will be an ideal response?
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Which cells make up the ground tissue that provides rigid support via the thick, typically lignified, cell walls that remain after the cells die?
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Biology & Microbiology
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Biology & Microbiology