Inelastic demand is the opposite. People will buy goods with an inelastic demand no matter what the price is. A good example of this would be gas. People complain and complain about gas prices, yet they still buy it because they need it, even if it $3 a gallon. Another example would be life-saving medications.
They have tube-like bodies and a numâ¦ber of tentacles that contain stinging cells called cnidocytes that they use to catch their prey. They have radial symmetry. Hydras are predatory animals belonging to the phylum Cnidaria and the class Hydrazoa. They are related to such things as jellyfish and coral. Specifically, THE Lernean Hydra was a serpent-like creature from Greek Mythology. It was an ancient water beast that possessed many heads and poisoned breath.
Classification. Tetrapods are classified within the following taxonomic hierarchy: Animals Chordates Vertebrates. Tetrapods are divided into the following taxonomic groups: 1  Amphibians (Lissamphibia) - There are about 5,000 species of amphibians alive today.2  Members of this group include frogs, toads, caecilians, newts, and salamanders.etrapods are a group of vertebrates that includes amphibians, reptiles, birds, and mammals.