Assertion: gametophyte's sporophyte | /r/HasProperty | indistinguishable
Facets:
value: histologically
type: DEGREE
value: externally
type: DEGREE
Source sentences:
text: Filamentous algae of the genus Cladophora , which are predominantly found in fresh water, have diploid sporophytes and haploid gametophytes which are externally indistinguishable.  
text: Its unique and key defining feature is that the gametophyte and sporophyte are indistinguishable histologically, except for the presence of either gametangia or sporangia.