The idea that mitochondria and chloroplasts descended from free living prokaryotes engulfed by ancestral cells is called the
Correct answer: D. endosymbiotic theory
- A. cell theory
- B. germ theory
- C. theory of biogenesis
- D. endosymbiotic theory
Explanation
The endosymbiotic theory is supported by the double membranes, circular DNA and 70S ribosomes of both organelles. Cell theory states that all organisms are made of cells, and germ theory links microbes to disease, so neither addresses organelle origins.
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About Animal and Plant Cell
Animal and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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