Question

Pick out the sentences that correctly describe marine mammals. There can be more than one.

Marine mammals are endothermic, or warm-blooded. Species such as whales breathe air though their gills. They have a thick layer of blubber that helps maintain buoyancy. They can stay underwater indefinitely. Dolphins are a type of toothed whale. Baleen whales feed on large fish and sometimes seals.

Answer 1

“Marine mammals are endothermic, or warm blooded.” - CORRECT, marine mammals are warm blooded.

“Species such as whales breathe air through their gills” -INCORRECT, whales do not have gills.

“They have a thick layer of blubber that helps maintain buoyancy.” -CORRECT, blubber helps marine mammals stay buoyant, or float.

“They can stay underwater indefinitely” -INCORRECT, Many marine mammal species can stay underwater for a long time, but must come to the surface to breathe.

“Dolphins are a type of toothed whale” -CORRECT, Most whales belong to the group of toothed whales such as all dolphins and porpoises.

“Baleen whales feed on large fish and sometimes seals.” -INCORRECT, In general, baleen whales feed low on the food chain, primarily eating zooplankton and small fishes.

Answer: sentences 1,3,5 are correct

Hope this helps :)