Which of the following animals is marine? Marine mammals are classified into four different taxonomic groups: cetaceans (whales, dolphins, and porpoises), pinnipeds (seals, sea lions, and walruses), sirenians (manatees and dugongs), and marine fissipeds (polar bears and sea otters). ...
This property is called 'inertia of rest'. For example, when a bus or train starts suddenly, the person sitting inside has tendency to fall backward. This is because lower part of his body move with the bus and upper part of his body tends to remain at r