21. which of the following is not a feature of echinoderms? tube feet body segments radial symmetry endoskeleton

3points hurry! what is the relationship between biotechnology, sharkskin, and disease resistance? bioengineers have developed an artificial sharkskin that does not allow resistant bacteria to grow on it. disease-causing microbes have been genetically modified to keep them from infecting the skins of sharks. scientists have created a device that can be attached to the skins of sharks that dramatically increases their abilities to resist disease. sharkskin produces many chemicals that can be collected and used to create antibiotics.

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

Autonomous underwater explorers will be used to gather large-scale ocean information select the best answer from the choices provided ot