Assertion: cryptomonad's chloroplast | /r/HasAspect | additional membranes
Facets:
Source sentences:
text: While primary chloroplasts have a double membrane from their cyanobacterial ancestor, secondary chloroplasts have additional membranes outside of the original two, as a result of the secondary endosymbiotic event, when a nonphotosynthetic eukaryote engulfed a chloroplast-containing alga but failed to digest it—much like the cyanobacterium at the beginning of this story.
text: Chloroplasts that are the product of secondary endosymbiosis may have additional membranes surrounding these three.