15 30 meters 10 50 20 25 100 feet Mysticeti Baleen Whales Odontoceti Toothed Whales Sperm Whale (1) Physeter macrocephalus Pygmy Right Whale (A) Саperea marginata Minke Whale (C) Balaenoptera acutorostrata Bryde's Whale (C) Balaenoptera edeni Baird's Beaked Whale (2) Berardius bairdi Gray Whale (B) Eschrichtius robustus Killer Whale (3) Orcinus orca Humpback Whale (C) Megaptera novaeangliae Cuvier's Beaked Whale (2) Ziphius cavirostris Pilot Whale (3) Globicephala macrorhynchus Right Whale (A) Eubalaena glacialis Narwhal (4) Monodon monoceros Beluga (4) Delphinapterus leucas Bowhead Whale (A) Balaena mysticetus Bottlenose Dolphin (3) Tursiops truncatus Pygmy Sperm Whale (1) Kogia breviceps Sei Whale (C) Balaenoptera bonalis Amazon River Dolphin (6) Inia geoffrensis Dall's Porpoise (5) Phocoenoides dalli Fin Whale (C) Balaenoptera physalus Harbor Porpoise (5) Phocoena phocoena La Plata River Dolphin (6) Pontoporia blainvillei Blue Whale (C) Balaenoptera musculus Families 1- Physeteridae - Sperm whales 2 - Ziphiidae 3- Delphinidae Families Apatosaurus (One of the largest dinosaurs) - Bottlenosed whales - OCcean dolphins African Elephant Loxodonta africana (Largest land animal) A-Balaenidae B- Eschrichtidae C- Balaenopteridae - Rorqual whales - Right whales - Gray whales 4 - Monodontidae - White whales 5- Phocoenidae - Porpoises 6 - Planistidae Humans Homo sapiens - River dolphins (Adult) (Juvenile) 30 meters 100 feet 25 20 15 50 10 5 Figure 15.32 Some representatives of the order Cetacea. Note the differences between Mysticetes and Odon- tocetes.

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Evolutionary adaptations

Evolutionary adaptation is the process through which organisms adapt or adjust to their surroundings to increase the chances of survival, mating, and reproduction. An organism's behavior, physiology, and structure are adjusted or changed to make it more suited to its environment.