The biological species concept defines species as a group of populations that are reproductively isolated from others. However, this definition is not applicable to groups where sexual reproduction has not been observed yet or is extremely rare. Choose the correct option of organisms where biological species concept may therefore not apply:
1
Monocots and basal angiosperms
2
Ascomycetes and oligochaetes
3
Mosses and liverworts
4
Cyanobacteria and Euglenophyta