The endosymbiotic theory provides compelling evidence that mitochondria and chloroplasts were once primitive bacterial cells. How are chloroplasts and mitochondria similar to prokaryotes? All but ONE apply. A) Chloroplasts and mitochondria contain DNA. B) Chloroplasts and mitochondria have a nucleus. C) Chloroplasts and mitochondria contain ribosomes. D) Chloroplasts and mitochondria have a double membrane.

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )