Current location - Health Preservation Learning Network - Health preserving recipes - The following statement is correct: () A. There are both autotrophs and heterotrophs in prokaryotes. Chloroplasts of cyanobacteria contain phycocyanin and chlorophyll.
The following statement is correct: () A. There are both autotrophs and heterotrophs in prokaryotes. Chloroplasts of cyanobacteria contain phycocyanin and chlorophyll.
A prokaryotes include autotrophs, such as cyanobacteria that can carry out photosynthesis, and heterotrophs, such as Escherichia coli. A is correct;

B, cyanobacteria are prokaryotes, without chloroplasts, B error;

C, prokaryotic cells have no nucleus covered by nuclear membrane and no chromosomes. C is wrong;

D, some unicellular organisms are eukaryotes, such as amoeba; Some prokaryotes, such as various bacteria, have D errors.

So choose: a.

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