Which of the following organelles are most likely to be able to divide and reproduce much like a cell does?
A. both mitochondria and chloroplasts
B. peroxisomes only
C. mitochondria only
D. chloroplasts only
E. mitochondria, chloroplasts, and lysosomes
Answer: A
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Which of the following is not a true statement about receptors that are localized to the nucleus?
A. They were synthesized in the cytosol. B. They carry a nuclear-localization signal. C. They bind polar ligands. D. They moved through a nuclear pore.
The life cycle of the Chinese liver fluke goes through which of the following sequences in its life history?
A. adult, shelled embryo, miracidium, cercaria, sporocyst, rediae, metacercaria, adult B. adult, shelled embryo, miracidium, sporocyst, rediae, cercaria, metacercaria, adult C. adult, shelled embryo, miracidium, metacercaria, sporocyst, rediae, cercaria, adult D. adult, miracidium, sporocyst, rediae, cercaria, metacercaria, shelled embryo, adult E. adult, shelled embryo, sporocyst, rediae, cercaria, metacercaria, miracidium, adult
If S. niagarae did evolve into S. yellowstonensis this would be an example of which of the following?
a. Directional selection b. Stabilizing selection c. Disruptive selection d. Artificial selection
Conservation of amino acid sequence among distantly related groups of organisms is suggestive of a(n) ________
A) intrinsic resistance to mutations in that sequence B) lack of common ancestor C) lack of selective pressure on that sequence D) important function for that sequence