Explain how the Hawaiian Island chain provides evidence in support of Plate Tectonics.
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Through studies using the animal cap assay this morphogen was shown to be important for the determination of the different types of mesoderm tissue in the developing embryo.
A. activin B. noggin C. Spemann's organizer D. Hox gene E. cadherins
Which of the following has increased as a direct result of stratospheric ozone depletion?
a. CO2 b. UVB c. CFCs d. nitrous oxides e. sulfur oxides
Which of the following statements is true regarding Drosophila?
A) The ratio of autosomes to fly Y and X chromosomes determines fly sex. B) The Y chromosome plays no role on fly sex determination but does contain genes for fly reproduction. C) The Y chromosome determines male flies. D) The Y chromosome plays no role in fly sex determination or fly reproduction. E) The ratio of X to Y chromosomes determines fly sex.
If Nirenberg and Leder had the technology, what would be a better substitute to using radiolabeled amino acids?
A. amino acids labeled with a fluorescent dye B. radiolabeled proteins C. radiolabeled tRNAs D. All of the answers are correct.