Four the following statements are true about the mitochondrion. Which statement is false?
a. It has its own DNA.
b. Its DNA has few noncoding regions between genes.
c. It evolved from chloroplasts.
d. It resembles bacteria in structure.
e. It resembles bacteria in size.
ANSWER: c
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What is the correct order of these meiotic events?
A Segregation of homologous chromosomes to opposite poles. B Segregation of sister chromatids to opposite poles. C Alignment of homologous pairs on the midplate of the cell. D Pairing and synapsis of homologous chromosomes. E Condensation of chromosomes in a diploid nucleus. A) CDEAB B) DCEBA C) EDCBA D) EDCAB E) DCABE
There is a range of color in mice from black to brown to gray to white. In a region of white sand there is a black volcanic deposit. The white mice survive better on the white sand and the black mice survive better on the black volcanic deposit. This could be an example of
A. sexual selection. B. disruptive selection. C. directional selection. D. stabilizing selection.
Which lineage do frogs and toads belong to?
a. Anura b. Gymnophiona c. Aves d. Squamata
Meiosis typically results in the production of _____________________.
A. two diploid cells B. four diploid cells C. four haploid cells D. two haploid cells E. one triploid cell