Multiple choice

Which of these species belong to order Cetacea?

  1. Trichechus, Delphinus, Phocaena

  2. Dugong dugon, Trichechus and Balaenoptera

  3. Trichechus, Rhytina, Dugong

  4. Balaenoptera musculus, Delphinus delphis, Physeter catodon

  5. All marine mammals belong to order Cetacea
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct answer. All of these belong to order Cetacea. Cetacea and Sirenia are two orders of class mammalia.They are mosinus delphistly marine, large fish like mammals adapted to life in water. Cetaceans are predominantly carnivorous animals, e.g., Balaenoptera musculus(blue whale), Delphinus delphis(dolphin), Phocaena(porpoise). Sirenians on the other hand are herbivores, e.g., Manatee(Trichechus) and Dugong (Dugong dugon).

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