d. endosymbiosis. c. endocytosis. d. exocytosis. 10. Mitochondria and chloroplas
ID: 200166 • Letter: D
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d. endosymbiosis. c. endocytosis. d. exocytosis. 10. Mitochondria and chloroplasts resemble bacteria in that they a. have their own DNA b. have their own ribosomes. c. reproduce by simple division into two. d. All of the above 11. Which of the following is a colonial organism closely related to the evolutionary precursors of present-day plants? b. Dictyostelium discoideum c. Volvox d. Arabidopsis thaliana 12. The equivalent of coenzyme Q (Co0) in photosynthetic electron transport is a. cytochrome c. b. plastocyanin. c. plastoquinone. 13. E coli is a useful model system for molecular biology studies because a. it has a small genome. b. it reproduces rapidly c. mutants can easily be isolated from culture dishes. d. All of the above 14. Electron microscopes have a resolution advantage over light microscopes because a. electron microscopes allow the viewer to examine living cells b. electron microscope lens have a larger numerical aperture. c. electron microscopes are easier to use. d. the wavelength of electrons is shorter than that of light. 15. The light-dependent generation of ATP in photosynthesis occurs in the stroma.1... b. inner membrane. c. thylakoid membrane. d. thylakoid lumen 16. The simplicity and clarity of Caenorhabditis elegans allowed researchers to a trace the developmental lineages of all cells in the adult.Explanation / Answer
1) Have their own DNA - Both mitochondria and chloroplasts have their own DNA like bacterial cells. This is one of the evidences of endosymbiotic theory, which explains the origin of organelles in eukaryotic cells. Organelles such as mitochondria have a double membrane which resembles the cell membrane of a prokaryote.
2) Volvox - Volvox is a green algae that can form multicellular colonies with about 50,000 cells. By evolution unicellular ancestors of volvox formed muticellular colonies. Each colony colony contains different type of cells for different functions.
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