Which statement describes evidence in support of the endosymbiont theory?
A) The sequence of mitochondrial rRNA genes are most similar to the rRNA genes in purple bacteria.
B) Mitochondrial and chloroplast DNA is organized into nucleosomes.
C) Mitochondria and chloroplasts have genes that allow them to live independently.
D) Mitochondria, chloroplasts, and cytoplasmic translation are inhibited by antibiotics such as chloramphenicol.
A) The sequence of mitochondrial rRNA genes are most similar to the rRNA genes in purple bacteria.
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Which of the following is in the coding region of a gene?
A. Trailer B. Promoter C. Leader D. None of the choices are correct.
A plant with its floral structures arranged around a central axis has _________________ flowers.
Fill in the blank(s) with the appropriate word(s).
The microscope that allows the specimen to appear three-dimensional is the
A. phase contrast microscope. B. interference microscope. C. fluorescence microscope. D. dark-field microscope.
Which is a correct pairing of a biome and its characteristics?
A) temperate broadleaf forest—mild winters; scarce rainfall; predominantly dicot vegetation B) chaparral—mild, rainy winters; long, hot, but wet summers C) savanna—long, cold winters; vegetation dominated by conifers D) tundra—very cold winters; only the upper layer of the soil thaws during summer