Archibald Garrod was the first to advance the idea that there is a direct link between ____________________ and ____________________
Fill in the blank(s) with correct word
genes; proteins
proteins; genes
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During ____ , N2 within the atmosphere is converted to NH3. Primary producers can then use the nitrogen from NH3 to build organic compounds
Fill in the blank with the appropriate word.
Homologous pairs separate during which phase of meiosis?
a. prophase I b. prophase II c. anaphase I d. anaphase II
Based on its outer shell, the atom in the accompanying figure would be characterized as ____
a. very stable b. somewhat stable c. somewhat unstable d. very unstable e. radioactive
Figure 19.4
The area labeled "spark discharge" in the accompanying figure contained all of the following gases found in the ancient Earth atmosphere except:
A. carbon dioxide. B. methane. C. ammonia. D. water vapor. E. hydrogen gas.