Why are dolphins and whales called mammals even they swim like fishes

Both Whales and Dolphins are classified as mammals since they produce milk to feed to their young. Unlike other creatures in the sea, they also have warm blood, not cold.

They are not fish, they are cetaceans! Unlike fish, they don't have gills, they are viviparous, which means they don't lay eggs and they produce milk for their babies. Also, they are warm-blooded.

the answer is c cumulus. cumulus clouds can be seen on a gray and rainy day, because cumulus clouds create thunderstorms. give me brainliest if right.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."