Which Group's Members Have Had Both Lungs and Gills During

Question

Which group's members have had both lungs and gills during their adult lives?
A)sharks, skates, and rays
B)lungfishes
C)lancelets
D)amphibians
E)ichthyosaurs and plesiosaurs

Accepted Answer

Lungfishes are known for possessing both lungs and gills, which they use interchangeably based on the oxygen levels in their environment. The other options listed do not have this characteristic. Sharks, skates, and rays only have gills, lancelets only have gills, amphibians have lungs but lose their gills during metamorphosis, and ichthyosaurs and plesiosaurs are extinct and do not have relevant biological traits to consider.