If only one twin has a trait, the twins are ____________________ for that trait.Fill in the blank(s) with the appropriate word(s)
discordant
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How does radiometric dating work?
1.Cooling of molten rock produces particular mineral structures that can be used to determine when a crystal formed. 2.Radioisotope decay speeds up over time, so a graph can be made to predict the date. 3.Although ratios of atoms cannot be determined precisely, their half-lives can be used to predict an approximate date that a crystal formed. 4.Fossils older than 60,000 years can only be dated using carbon 14 since all other atoms will have decayed since then.
Compact bone tissue is located in the area
indicated by a. A. b. B. c. C. d. D. e. E.
A sprinter (very fast runner) can rapidly use up its store of ATP energy. How can one obtain ATP quickly?
a. All of these choices are possible b. Through glycolysis and the Kreb's cycle where ATP is produced through substrate phosphorylation. c. Through lactic acid fermentation where the production of ATP is low, but fast. d. rough oxidative phosphorylation where the output of ATP energy is greatest
Which molecules are not required to express a gene in eukaryotic cells?
A) RNA polymerase B) DNA-bending protein C) activator protein D) repressor protein