Hydrophones scientists listen to and record sound waves from the ocean. which statement best describes how ocean water affects sound waves?

A3-year-old child with nephrotic syndrome has been receiving prednisone for 1 week. the nurse reviews the child's progress record and determines that the medication has been effective. what information supports this conclusion? select all that apply.

The smallest parts of these that retain their original properties are called

There are only about 250,000 known fossil species. true or false