Which of the following statements is true according to the endosymbiotic theory?
A) Mitochondria and chloroplasts developed from organisms that were once free-living
B) Bacteria were engulfed by larger cells and became the nucleus of those cells
C) Photosynthesis algae evolved from plants
D) None of the choices are correct
E) Bacterial flagella have the same evolutionary origin as eukaryotic flagella
Ans: A) Mitochondria and chloroplasts developed from organisms that were once free-living
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A new dicotyledon vegetable has just been imported into the United States from Ecuador. The edible portion is a succulent stem. When you eat this tasty treat you notice a flexible stringy tissue located just inside the epidermis. Even though this new vegetable is tasty, this "stringy stuff" tends to gets caught in your teeth. Discuss several plant tissues that fit the description of this "stringy
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Radioactive decay can be used to measure which of the following?
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