Which of the following statements best supports the idea of endosymbiosis, which claims that certain organelles found within eukaryotic cells evolved from smaller free-living prokaryotic cells? a: Eukaryotic and prokaryotic cells both have a cell membrane, cytoplasm, and ribosomes.
b: Some eukaryotic organelles, such as the mitochondria and chloroplasts, have their own separate DNA, which is similar to the DNA found in bacterial cells.
c: Eukaryotic cells can be either autotrophic or heterotrophic, while prokaryotic cells can only be heterotrophic.
d: Prokaryotic cells lack a nucleus, but do have a circular chromosome consisting of DNA.

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these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.