As the first steps in creating recombinant DNA molecules were taking place, scientists immediately realized that modifying the genetic information in ____________________, a bacterium from the human gut, could be potentially dangerous
Fill in the blank(s) with correct word
Escherichia coli
E. coli
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As you saw while performing thin layer chromatography, photosynthetic pigments are mostly hydrophobic substances soluble in organic solvents but not in water-based solutions. How does this feature explain the location of these pigments within the chloroplast?
What will be an ideal response?
Behavioral traits are useful in distinguishing among species because
a. behaviors are always genetically determined. b. courtship behaviors and timing of mating may create prezygotic isolation. c. behaviors are easy to assess in dead and fossilized specimens. d. behaviors are independent of morphological characteristics. e. behaviors are always learned
DNA replication occurs
a. during cell division. b. continuously. c. before cell division. d. only once in the life of the organism. e. only in gametes.
Which of the following statements is(are) true of
homeotic genes? a. More than one hundred of them have been identified. b. The same mechanisms control their transcription regardless of the species. c. Many of them are functionally interchangeable among species. d. They likely evolved in the most ancient eukaryotic cells. e. All of these are true.