Mitochondria and chloroplasts have their own DNA but use the ribosomes of the host cell
Indicate whether the statement is true or false.
Answer: FALSE
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Homarus americanus and Bufo americanus are ____ because ____
a. different species; they are classified in different genera b. the same species; they have the same specific epithet c. plants; all plants have the specific epithet americanus d. closely related; they have the same specific epithet e. classified in different domains; they have different scientific names
The impact of natural selection is demonstrated by
a. directional selection. b. stabilizing selection. c. neutral selection. d. disruptive selection. e. directional selection, stabilizing selection, and disruptive selection.
DNA microarrays use enzymes to convert mRNA obtained from the cell into cDNA. This cDNA is hybridized with known DNA from specific genes isolated from the organism. If hybridization occurs, what does this mean?
A. It means the DNA has transformed into another type of DNA and the corresponding genes are present in the cell. B. It means the DNA has not transformed into another type of DNA and the corresponding genes are not present in the cell. C. It means the cDNA has bound to complementary DNA on the microarray, indicating that the corresponding gene is being expressed in the cell. D. It means the cDNA has not bound to the complementary DNA on the microarray, indicating that the corresponding gene is not being expressed in the cell.
Which microscope uses two beams of light to produce a three-dimensional color image?
A) fluorescence microscope B) phase-contrast microscope C) darkfield microscope D) DIC microscope E) electron microscope